Two-Caveman Play Down the Drain
Damn Jim, there goes my idea for the first play I was going to write for you. It was going to be about two cavemen wandering around Soho, trying to find Jack Spade to convince him to design a custom caveman purse. Instead they find David Spade and end up collaborating with him on an off-Broadway, one-caveman show. :)

I probably can't do it now without violating some copyright:
Geico's caveman may get own TV series