A Kikstart style game would be ace, perhaps with Quad bikes rather than cars or motorbikes, with a rider that you can make lean left/right and forwards/backwards to affect the balance and get you over obstacles. He could also bounce on the footplates to make the bike hop. It'd be really cool to see a vehicle based physics puzzle game.
Also, you could have proper ragdoll physics for the rider when he falls off.
Also, you could have proper ragdoll physics for the rider when he falls off.