In the earlier Stooges shorts, there is a dubbed in "Ughmph!" when someone is knocked down to the floor. It happens twice in BOOBS IN ARMS when Curly head-butts Richard Fiske in the stomach. Does anyone know whose voice it is?
You're probably talking about the sound effect I've (for lack of any more inspired name) always called the "fall down, grunt" effect. And yes, it's in lots of other Columbia films, not just comedy shorts. It can be especially funny (unintentionally) to hear it in some dramatic serious movie because of its familiarity from Stooges shorts ... it'll result in an unintended laugh for Stooges fans where the filmmakers obviously didn't plan one.
I never really thought about its origin or first usage. But a couple nights ago I was watching the 1935 Columbia short HONEYMOON BRIDGE starring Leon Errol and there it was when Leon tripped over a floor broom/mop type thing. Watching it on 16mm film I couldn't easily stop & rewind to listen again (although I do also have it on video), but it sounded like Errol's voice, so it made me wonder if that may have been its first usage.
Has anyone noticed it in any film earlier than this Leon Errol short (filmed in late August 1935 and released in early October 1935)?