Don’t know what it’s called, but there’s a form of “smash up derby” motor racing that I’ve only ever seen once on TV years ago, but it tickled me:
You get three old cars and tie them together like a train. The lead car is fully functional. the middle car has no motor or steering, and there’s nobody inside it. The rear car has no motor, but a second guy is in it to steer. You place two of these car-trains on a fibure of 8 dirt track and let 'em go for it.
Stupid and fun.