Birds Do It (1966)

Melvin Byrd who dreams of being a scientist is a Cape Kennedy miniscule molecular particle surveillance monitor in short a janitor His job is to keep a major rocket project completely dustfree and this he does with his own hilariously fantastic inventions including a literal attack on dirt by a knight on a white horse In his work he meets Judy a chimp involved in a topsecret project which leads Melvin into the one room strictly offlimits to him Not until he has entered the project room does Melvin learn that any man entering it will be negatively ionized making him fly like a bird