Back when you had to beat it before you could eat it...
Yes, that's a former Beatle in caveman costume for this 1981 comedy about a prehistoric misfit (Ringo Starr) who recruits other misfits to start a new tribe. The jokes about flatulence and sex are banal, but the cast of then-unfamiliar faces is fun to watch from the perspective of history. The best thing going are some dinosaur special effects, though Ringo might argue meeting his future wife (Barbara Bach) was a good deal.