Guy has Seizure While Skydiving

When is the worst time to have a seizure? Really can't think of a good time to have one, but I'd imagine this might be the worst.

He looks fine when he jumps out of the plane. He even does a few tricks, but then he rolls over on his back and begins to fall even faster. The jumpmaster with the camera does some fancy flying and saves the guys life by pulling his cord for him.