Face protector.
Came in handy on more than a few occasions.
I don't remember what that trick was called but basically ( as is the case with every trick back then ) I start from a riding position, lock the rear brake, and kinda hop and spin all at the same time landing on the back pegs facing backwards. At which point I can hop around a bit or kick the tire and kinda scoot around like that.
After all that just jump and spin again and return to the riding position and ride away never letting my feet touch the ground.