There are a lot of people in this building. Just one person has to see you, and we're dead.
6 seconds sound clip from the The Seven Year Itch (1952) movie soundboard.
You can hear this line at 01:21:08 in the Blu-ray version of the movie.
Quote context
[...]
- Of course you can sleep here. Why not? After all, we're not savages. We're civilized people.
- What time you get up in the morning?
- I'll fix your breakfast before I leave.
- Now, wait a minute. Suppose someone sees you leaving the apartment at 8:00 in the morning?
- There are a lot of people in this building. Just one person has to see you, and we're dead.
- All right then. I could get up at 6:00 and sneak upstairs.
- Sneak! That's even worse. Suppose someone sees you sneaking out of here at 6:00 in the morning?
- But we're not doing anything wrong.
[...]