The Dark Backward (1991)

The Dark Backward is a dark and surreal comedy about Marty Malt, a struggling stand-up comedian, and Gus, his mutant garbage collector best friend. Marty dreams of becoming a successful comedian, but his anti-humor routines are met with disgust and rejection. However, everything changes when Marty starts growing an arm out of his back, which becomes his unique selling point. As Marty's career takes off, he must navigate the challenges of fame, friendship, and the dark side of comedy.