This is one of my favorite movie details. When Marty McFly complains about his cowboy outfit in Back to the Future III, specifically that Clint Eastwood never wore stuff like this in the movies, there are two movie posters next to him.

The first is Revenge of the Creature, which was Clint Eastwood’s film debut. But the poster cut-off at the edge of the frame is Tarantula, which was Eastwood’s fourth film credit ever. It’s a nice visual joke for old school film geeks.