Cannibalistic Humanoid Underground Dwellers

A staple of eighties home video. Though by no means an exceptional film, C.H.U.D. was widely seen by many. Word of mouth made it the butt of multiple jokes by several comedians. Its also, as far as I know, the only horror film to feature two actors from Home Alone, one from Roseanne, and another from Mork & Mindy.