This was a bit of shared stupidity, some of it on the man himself, some on his buddies and a greater part on the French Air Force.
For the man himself, I can only assume he agreed to fly so that he wouldn’t be called a wuss. Seems the best explanation why he went along with this.
For the man’s buddies, did they even have a ******* clue???
As for the French Air Force, even the most cursory medical check would have indicated this man was unfit to fly. The man was wearing a watch which recorded his heart rate, showing that his heart was in full tachycardia PRIOR to boarding the aircraft.
So when the flight took off and started to climb, at 2500 ft, the man panicked and grabbed the nearest object, which sadly was the ejection seat button. His helmet was not fastened correctly and flew off during the ejection. But he parachuted down without serious injury.
Hopefully, next time they choose a slightly calmer activity.