as kids we played a game that was less intensive...... played with a tennis ball, the object was to throw it against the wall where you got possession of the ball, if you missed the wall you had to run and tag the wall before someone else grabbed it and threw it at the wall. Last one standing wins
Been doing this for a few years: street luge [video=youtube;TNJrjoyZI5E]http://www.youtube.com/watch?v=TNJrjoyZI5E"[/video] biker s from the vid is pretty ferocious. and a few other things to list out.
^ That seems soo fun + dangerous at the same time. Training for winter olympics. You must need an empty(traffic-less) downhill road!