The surveillance video, now circulating widely online, shows the unidentified man walking calmly across the dark runway late Friday night as Frontier Airlines Flight 4345 accelerated toward takeoff. Moments later, the Airbus A321neo slammed into him at nearly 139 miles per hour before the aircraft’s engine erupted in flames.

According to airport officials, the horrifying incident occurred around 11:19 p.m. as the Los Angeles-bound flight carried 224 passengers and seven crew members out of Denver International Airport. Authorities say the man had illegally breached airport security only minutes earlier after climbing over an eight-foot perimeter fence topped with barbed wire.

The newly surfaced footage reportedly shows the trespasser walking with what witnesses described as an “eerily calm” demeanor directly into the aircraft’s path. Seconds later, the plane violently struck him and partially pulled him into one of its engines.

Passengers onboard immediately realized something catastrophic had happened.

Audio recordings from the cockpit captured the pilots urgently informing air traffic control: “We just hit somebody,” moments before reporting smoke and a possible fire onboard the aircraft.

Inside the cabin, chaos exploded.

Travelers described hearing a deafening bang beneath the plane followed by violent shaking as smoke rapidly filled the cabin. Videos recorded by passengers showed terrified families screaming, crouching low in the aisles, and rushing toward emergency exits while flight attendants shouted evacuation orders.

One witness later claimed passengers near the wing could see “body parts” trapped near the damaged engine after the collision, while emergency radio traffic described “limbs on the runway” as first responders rushed to the scene.

The pilots immediately aborted takeoff as flames burst from the engine area. Emergency crews surrounded the aircraft while passengers escaped onto the freezing tarmac using inflatable evacuation slides. Twelve people suffered minor injuries during the evacuation, and five were transported to local hospitals.

Authorities later identified the dead man as 41-year-old Michael Mott. Investigators now believe the incident was an intentional act, and the Denver Medical Examiner officially ruled his death a suicide caused by “multiple blunt and sharp force injuries.”

As the investigation deepens, disturbing questions are growing over how the man managed to access one of the busiest airports in America without being stopped.

Denver officials admitted that security alarms had been triggered before the collision, but personnel initially believed nearby deer had activated the perimeter system. By the time authorities realized an actual intruder had entered the runway area, the aircraft was already accelerating for takeoff.

Federal investigators from the FAA and NTSB are now reviewing both the runway breach and the emergency evacuation response as scrutiny intensifies around airport security procedures nationwide.

And as the horrifying footage continues spreading online, many viewers are left haunted by one chilling image above all else — the lone figure calmly walking through the darkness toward a speeding passenger jet seconds before disappearing into the flames.