scorpion grind

When you attempt any trick on a bike or board and mess up falling face first on the ground. While your face is in the dirt your legs bend up and over your body behind your head.

Karo-How did Peter get that scar on his face?

Al- Peter was riding his bike missed the rail with his peg and decided to do a scorpion grind instead.

Karo- ouch, did his heels touch the back of his head?

Al- yes, it was perfect form.