At least 15 years ago, I saw part of a Mexican comedy film, probably on Channel 44 here in Chicago, in which the main character is knocked unconscious and dreams he is a caveman back in prehistoric times. It's a black and white film, probably from the late 1950s-early 1960s. It was really quite funny. For years I've been trying to track down the title of this film. I've googled every possible combination of Spanish/Mexican/caveman/dinosaur/prehistoric/movie/film/comedy I could think of and still haven't found it. Does anyone have ANY idea what this might be?