Say, Ollie...
3 seconds sound clip from the A Chump at Oxford (1939) movie soundboard.
You can hear this line at 00:41:24 in the DVD version of the movie.
Quote context
[...]
- No, no, no, he's coming down the hall. What shall we do?
- Nobody there, it couldn't have been somebody.
- Well, what would you do in a case like that?
[...]