Cannonball! [AKA Carquake] (1976, dir. Paul Bartel)

Various racers compete – and cheat – in a trans-American car race. Enjoyably ramshackle road comedy typical of the subgenre packed with lo-fi vehicle stunts, sly humour, and cameo appearances from Roger Corman’s phone book: everyone from Martin Scorsese to Sylvester Stallone shows up.

Here’s the trailer.