Motocross!

At the starting line you strap on your helmet, check your instruments, gun your engine and surge onto the course. Through the corners, up the hills, in to the ruts and down the straights you maneuver for position and try to beat the clock. Stay ahead if you can. But whatever you do, stay on the course. If you don't, one of two things will happen. You'll slow down and lose valuable seconds getting back into the race or end up on the seat of your pants. Who says computers don't like to get dirty.