Roadside Prophets

Roadside Prophets is a 1992 American comedy film written and directed by Abbe Wool, featuring musicians John Doe of the L.A. punk band X, and Adam Horovitz of the Beastie Boys with cameo appearances by, amongst others, Timothy Leary, Arlo Guthrie, David Carradine, Flea, an uncharacteristic performance by John Cusack as Caspar, a selfstyled Symbionese rebel, and a very early film performance by Don Cheadle.

Source: Wikipedia