Rolling Harpoon
Start with a naked man and a naked woman. Stuff the woman in a trash can place a lid on top. Proceed to cut a hole where her cooter would be and then give it a good push down the hill. Quickly take off after buck naked in your roller blades and try to aim your raging boner into the hole that was previously cut. NO HANDS ALLOWED. *success is very difficult and your penis may be severed.
Man! I totally pulled the rolling harpoon on your mom in the park yesterday afternoon.