“Possibly the scariest moment of my life,” he writes in the description of the video, which was posted by the account “Nomadic Adrenaline.”

The skydive, which took place in November of last year, was part of the “Accelerated Free Fall program” in which Jones was enrolled. Luckily, his instructor Sheldon McFarlane accompanied him on the dive and was able to pull Jones’ ripcord for him.

“At around 9000ft I have a seizure while attempting a left hand turn,” the YouTube post reads. “I then spend the next 30 seconds in free fall unconscious. Thankfully my jumpmaster manages to pull my ripcord at around 4000ft. I become conscious at 3000 ft and land safely back to the ground.”