We didn't witness it. From speaking with pilots who did, the pilot
had a good angle of attack on the cart and launched off the cart well. The pilot
was a little above the tow plane, but this is fairly normal. I'm usually above
the tug when I come off the cart.

The pilot was flying straight then drifted off to the right. Then a wing came up
and the pilot appeared to the tug pilot to be going into a lockout attitude. The
pilot did not take action to correct their position or attitude. The
tug pilot gave the hang glider pilot the line. At this point the hang glider
was stalled and the pilot did not pull in. The hang glider spun in.

The pilot was knocked out and helicoptered to the trauma center at Orlando
Regional.

This is not a practice day and the pilot was not in the upcoming competition.

My recommendation for a helmet:
https://ozreport.com/23.058#2 It is my contention that if the pilot had been
wearing a full- faced helmet of this construction they would not have been
knocked out.