How could you be reading documents when they're in your briefcase? That's a mystery.
8 seconds sound clip from the Tommy Boy (1995) movie soundboard.
You can hear this line at 01:01:16 in the Blu-ray version of the movie.
Quote context
[...]
- Where are they? Geez, I don't see them.
- I thought you were getting pizza.
- How could you be reading documents when they're in your briefcase? That's a mystery.
- Were you watching 'Spank-tro-Vision'?
- Maybe you were watching a movie with that funny comedian, oh, what's his name? Buddy Wackett?
- All right then, let's get some shut eye!
- Hey, that's a pretty girl down there.
[...]