There’s a ‘Demon’ Under the Bed in This Early 2000s Comedy, and Even the Directors Can’t Explain It

The 2003 Farrelly brothers comedy Stuck on You stars Matt Damon and Greg Kinnear as conjoined twins named Bob and Walt. There’s no official credit anywhere in the movie, but several fans have pointed out over the years that Damon and Kinnear also briefly share the screen with another person whose identity is apparently still…