Let's go.
3 seconds sound clip from the Harry Potter and the Sorcerer's Stone movie soundboard.
You can hear this line at 01:05:05 in the Blu-ray version of the movie.
Quote context
[...]
- I'm telling you, it's spooky. She knows more about you than you do.
- The staircases change, remember?
- Before the staircase moves again.
- Does anybody feel like we shouldn't be here?
- We're not supposed to be here. This is the third floor. It's forbidden.
- Run!
- Quick, let's hide through that door!
- Oh, move over! Alohomora. Get in.
[...]