The Gumball Rally (1976)

A group of people from different backgrounds have one thing in common: when they hear the world "gumball" whispered by one of the others, they know that it's time for the Gumball Rally: a no-holds barred, secret, winner-take-all rally across the USA. Gumball Rally immortalizes Brock Yates' Cannonball Baker cross-continent (and illegal) street races in a joyously anti-establishment poke at the Nixon/Carter era 55 MPH national speed limit.