For those who dream about offing an obnoxious classmate, Heathers is the ultimate fantasy. Full of mordant wit, shocking violence, and savvy performances by Christian Slater and Winona Ryder, the flick was the antithesis of the earnest '80s John Hughes films — you'd never see Molly Ringwald serving up a kitchen-cleaner cocktail for Ally Sheedy. Even today, Heathers' spin on cliques, teen suicide, and homosexuality still has bite.