Monkey Business (1952)

A scientist (Cary Grant) is working to find a "fountain of youth"-type solution. When one of the test subject chimpanzees gets out of her cage and mixes up an extremely effective formula then dumps it in the lab's water cooler, things get a little out of hand.

I say "a little" because it's apparent that this is supposed to be a zany, fast-moving laugh-riot with Grant and Ginger Rogers as wife taking turns behaving like a 20-year-old and a child respectively. Though there were a couple of silly moments, it was, for the most part, terribly mild.

D