Given to the smallest, weakest kid during games lessons. Victim is pinned to the floor and asked if he wants "an accelerator". Regardless of the answer (no-one ever says "yes"), you spread his legs, put your foot on his bollocks, and floor it. The engine realistically rises in pitch as you press harder, just like a real car.
approved Sep 25 2011, submitted Jan 27 2003 by Nick Hunt