Sheila and the Brainstem (1989)

Somewhere in the American southwest Taz a nutty visionary has temporarily misplaced the wizened driedout Brainstem he found in a mysterious subterranean world which he believes is the key to immortality Three rebellious punks Sean Head and Billy Dork unknowingly steal it in the course of a convenience store robbery believing it to be a stick of beef jerky Newlyweds Bruce and Sheila have the misfortune to stumble into the confrontation between Taz and the Punks The punks kidnap Sheila as a hostage Taz kidnaps Bruce as his hostage the bizarre chase is on The two teams race across a landscape of identical convenience stores housing developments and rampant consumerism