I'll fight you.
5 seconds sound clip from the Harry Potter and the Sorcerer's Stone movie soundboard.
You can hear this line at 02:00:20 in the Blu-ray version of the movie.
Quote context
[...]
- You ought to be careful. People will think you're... up to something.
- We go down the trap door. Tonight.
- Trevor.
- Trevor, shh! go! You shouldn't be here!
- You're sneaking out again, aren't you?
- Now, Neville, listen. We were...
- No, I won't let you! You'll get Gryffindor into trouble again.
- Neville, I'm really really sorry about this.
- You're a little scary sometimes, you know that? Brilliant, but scary.
- Sorry.
- It's for your own good, you know.
[...]