There's no such thing as the "right time" to have a seizure, but man this really wasn't a good moment for one to happen.
From the video description:
Possibly the scariest moment of my life. On the 14th of November 2014 while doing stage five of my Accelerated Free Fall program I have a near death experience. At around 9000ft I have a seizure while attempting a left hand turn. 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.
Watch the dramatic rescue, AFTER THE JUMP…