The late and great astronomer and ufologist J. Allen Hynek created a generalized scale for classifying close encounters. You’ve probably heard of it. The scale runs from the First Kind up to the Seventh Kind. Here we focus on the Sixth Kind, the category that involves death or physical injury to a human or animal.

Understanding Close Encounters of the Sixth Kind

10 25 Bomber Carrying UFO Debris Crashes

On August 1, 1947, a B-25 Mitchell bomber went down in Washington state while allegedly transporting UFO debris that may have ignited the fire that downed the aircraft, killing both pilots. This was the first aircraft loss for the freshly formed United States Air Force, so the incident received extensive coverage and investigation. The drama began ten days earlier, on July 21, with a UFO sighting over Maury Island—also in Washington—where a man was injured and his dog killed by scorching debris falling from a reportedly broken doughnut‑shaped UFO, one of a six‑craft formation. That very debris was supposedly being carried by the ill‑fated B‑25.

The pilots who perished were intelligence officers and part of the Air Force’s probe into the Maury Island event. At that moment the newly minted Air Force was juggling a whirlwind of UFO activity: the Roswell case was less than a month old, and the famous Kenneth Arnold sighting occurred just three days after Maury Island. It was truly a hectic and bewildering period for the “boys in blue.”

9 Valentich UFO Encounter And Disappearance

One of the most unsettling and baffling disappearances of a pilot and his plane unfolded on October 21, 1978, when 20‑year‑old Australian aviator Frederick Valentich radioed that he was being harassed by an aggressive UFO. No trace of Valentich or his Cessna 182 was ever recovered after he reported the encounter off the coast of Bass Strait.

Valentich was on a 200‑kilometre (125‑mile) flight when he contacted Melbourne Tower, warning that a mysterious aircraft hovered 300 metres (1,000 ft) above him, flashing four brilliant lights. Controllers recorded his final words: “It’s not an aircraft…”, followed by eerie metallic scraping and crunching noises before the transmission cut out.

The Australian Air Force noted 11 separate UFO reports from people along the Bass Strait that night, though transport officials were skeptical. Some theorists suggested Valentich became disoriented by his own lights reflecting off the water while flying upside down. His father, Guio Valentich, insisted that the lack of any trace “really verifies the fact that UFOs could have been there.”

8 The Mantell UFO Incident

On January 7, 1948, around 1:30 PM, Captain Thomas F. Mantell of the Kentucky Air National Guard was flying his F‑51 toward Standiford Air Force Base alongside three fellow Guard planes. Simultaneously, Kentucky State Police were fielding public complaints about a massive, round craft seen over the town of Mansville, with sightings quickly spreading to Irvington and Owensboro. Godman Air Force Base’s control tower had a clear visual on the object, which Mantell described as “large, round, whitish, with a red light on the bottom, moving slowly southward.”

Just over an hour later, Mantell’s flight group was asked whether they had enough fuel to investigate the unidentified craft. After confirming they did, one pilot was cleared to continue his assigned course, while Mantell and two others received heading instructions from Godman Tower and took off toward the mystery.

Radio transcripts capture Mantell’s last words: “The object is directly ahead of and above me now, moving at about half my speed. It appears to be a metallic object or possibly reflection of Sun from a metallic object, and it is of tremendous size. I’m still climbing. I’m trying to close in for a better look.” Those were his final words.

7 Falcon Lake Incident

At noon on May 20, 1967, Stephen Michalak, an industrial mechanic from Winnipeg, Canada, was prospecting near Falcon Lake, Manitoba, when he spotted two strange aircraft. One hovered briefly before darting away at incredible speed. The second UFO landed only about 50 metres (160 ft) away, prompting Michalak to approach, calling out for help with the “crazy machine.” He tried every language he knew—six in total—but received no reply.

As he drew nearer, Michalak saw a panel open on the craft’s side, emitting a bright yellow‑blue light that blinded him. He reached out, and his gloved left hand made contact; the glove instantly caught fire. At that moment the panel slammed shut, a high‑pitched whine filled the air, and the craft began to spin counter‑clockwise before lifting off. The sudden burst of intense heat knocked Michalak backward, burning his shirt and forcing him to roll on the ground.

Half‑naked, injured, and terrified, Michalak managed to catch a bus home and was taken to the hospital. The Falcon Lake case was examined by Canadian authorities, the Condon Commission, several civilian UFO groups from the United States and Canada, the Royal Canadian Mounted Police, and the Canadian Department of National Defense, yet it remains unsolved.

6 Lady—The First Animal Mutilation

On September 7, 1967, “Snippy” the horse—officially named Lady—a three‑year‑old Appaloosa mare, failed to return for her customary morning drink on the Harry King ranch, 32 kilometres (20 mi) northeast of Alamosa, Colorado. Two days later, her mutilated body was discovered in the pasture. The cuts were clean and surgical; no tracks led to the carcass, but a circle of six indentations, each about 1 metre (3 ft) in diameter, suggested the landing gear of some kind of craft.

Examination revealed that Lady’s heart and brain were missing, and a strange formaldehyde‑like odor emanated from her remains. Ranch owner Harry King and Lady’s owner, Nellie Lewis, noted an odd incense‑like smell and a nearby bush that appeared to have been knocked down by intense heat. Nellie later found that the boots she wore to the site were radioactive, which also explained why a piece of mane she handled burned her hand.

Ranger Duane Martin of the United States Forest Service reported elevated radioactivity extending up to two‑city‑block radius around Lady’s body. The incident sparked the animal‑mutilation phenomenon in the United States and remains unexplained.

5 The Judy Doraty Abduction

In May 1973, four women—Judy Doraty, her daughter Cindy, her mother, and her sister‑in‑law—experienced a terrifying night together. After finishing a bingo game in Houston, they were driving back to Texas City, Texas, when they stopped to investigate a strange hovering light in the dark sky.

Mesmerized, they got out of the car to get a better view, watching the light in awe until it vanished. Back in the vehicle, Judy soon began suffering severe headaches and anxiety attacks. After numerous doctors dismissed her symptoms, she was referred to Dr. Leo Sprinkle, a well‑known hypnotist and ufologist who believed hypnosis could alleviate trauma from UFO encounters.

Under hypnosis, Judy recalled being abducted and taken aboard an alien spacecraft. She described witnessing a cow being lifted into the craft and systematically mutilated by two diminutive beings while she watched helplessly. She also reported a disconcerting sensation of existing in two places at once, yet she remained beside her car after the light disappeared, leaving her unable to explain the memories. Linda Moulton‑Howe later included footage of this regression in her documentary “A Strange Harvest,” which explores the animal‑mutilation phenomenon.

4 NTSB Says UFO Causes Fatal Cessna Crash

The National Transportation Safety Board (NTSB) concluded that a single‑engine Cessna that slammed into Big Bateau Bay, Alabama, on October 23, 2002, collided with an unidentified object—or was struck by something else entirely. The aircraft was tracked at 900 metres (3,000 ft) above the Mobile‑Tensaw Delta shortly after takeoff, then vanished from radar. The NTSB report highlighted an unusual red residue on the severely damaged nose and lower fuselage, suggesting it originated from another object that the Cessna collided with mid‑air.

The crash claimed the life of 54‑year‑old pilot Thomas J. Preziose of Mobile, Alabama, just minutes after departing the Downtown Airport in Mobile. The Cessna had passed an FAA inspection only days before the accident. Preziose was flying under contract for DHL Worldwide Express, en route to Montgomery with a 190‑kilogram (420‑lb) payload of business documents.

3 Maury Island Incident

In 1947, the waters off Maury Island, Washington, were bustling with log‑patrol boats. Harold Dahl operated one such vessel, with his son and their dog aboard, while shore supervisor Fred Crisman oversaw operations. On June 21, 1947, around 2:00 PM, Dahl radioed Crisman that he was nearing the island’s eastern shore when he witnessed six doughnut‑shaped crafts hovering roughly 600 metres (2,000 ft) above his boat.

The crafts appeared to be made of highly reflective metal, each about 30 metres (100 ft) in diameter, with “doughnut holes” around 8 metres (25 ft) across. Five of the six circled a damaged central craft that was slowly losing altitude. Fearing a collision, Dahl steered toward shore, then captured several photographs of the scene.

After a brief “in‑flight repair” maneuver, the damaged craft remained stationary while the other five circled overhead. One of the five descended to make contact with the central craft, and the two remained linked until a thud was heard, followed by thousands of debris pieces raining down. Most debris fell into the water, but some landed on the beach, where the Air Force later collected them. The debris was described as a light, whitish metal, along with a larger quantity of black, lava‑like metallic substance that steamed on impact.

The fallout was dramatic: the black metal rained onto the crew, burning Dahl’s son’s arm and breaking it, and killing their dog. The incident remains unsolved, and Harold Dahl became the first person to claim harassment by the infamous “men in black.”

2 Cash‑Landrum Incident

On a cold December evening in 1980, deep in the Piney Woods of Texas, Betty Cash (51), her friend Vickie Landrum (57), and Vickie’s seven‑year‑old grandson Colby encountered one of the most bizarre unknown aircraft ever reported. The trio was searching for a bingo hall when a distant light appeared, grew brighter, and revealed a fiery object struggling to stay aloft above the tall pines.

Initially assuming it was a conventional aircraft or helicopter from a nearby military base, they soon saw a massive, diamond‑shaped craft hovering directly over the road. At regular intervals, the object expelled columns of hellish‑orange flames that scorched the road surface—a spot that was mysteriously repaved shortly afterward. Vickie later described the craft as “a diamond of fire,” even remarking that it felt like “the end of time.”

Betty, entranced by the spectacle, stood outside while Vickie secured Colby in the car. When Betty attempted to open the car door, the handle was so hot she could barely touch it, and her hand was burned. She turned on the car’s air conditioner to cool the interior, which felt sticky and hot. After the craft lifted and vanished, the trio drove home, only to encounter the phenomenon again—this time surrounded by 23 military helicopters (mostly Chinooks and smaller Hueys) bathing the scene with searchlights.

All three fell seriously ill after the encounter. Betty developed blisters on her neck and head, her eyes swelled shut, and she suffered nausea. By the next morning she was nearly comatose. Vickie and Colby experienced similar, though milder, symptoms. Betty spent 15 days in the hospital being treated for radiation sickness; her hair fell out and her eyes remained swollen for a week. Betty died on December 29, 1998—exactly 18 years after the event—while Vickie passed away on September 12, 2007. Colby survived and continues to live in Texas. The trio sued the government, but the case was dismissed due to insufficient proof of involvement.

1 Dyatlov Pass Incident

The Dyatlov Pass Incident unfolded around February 2‑3, 1959, when nine hikers set out for the Ural Mountains’ Otorten peak, a summit locally nicknamed “Do Not Go There.” The group’s intended destination was also known as “The Mountain of the Dead,” foreshadowing the tragedy that would follow. Four days later, the Russian military discovered their campsite and found the hikers’ tent ripped open from the inside, their belongings abandoned, and the hikers themselves scattered in the snow, many without shoes or coats.

Autopsies revealed baffling injuries: some victims appeared mummified, while others suffered severe trauma comparable to high‑speed aircraft or automobile accidents—fractured ribs, internal organ damage, and massive bruising. No external wounds could explain the severity. The Russian authorities kept the case under wraps for decades.

Adding to the mystery, witnesses reported orange orbs hovering in the sky the night before the hikers vanished. Local Mansi legends speak of nine travelers who never returned from the same route, echoing the tragic outcome. To this day, the Dyatlov Pass Incident remains one of the most perplexing and eerie close encounters of the sixth kind.