All right, mister, I'm doing it!
5 seconds sound clip from the The Silence of the Lambs movie soundboard.
You can hear this line at 01:39:38 in the Blu-ray version of the movie.
Quote context
[...]
- Don't you make me hurt your dog!
- Hey, you don't know what pain is!
- Get me a live telephone and lower it down here, and do it now!
- You better be getting me that telephone!
- I'm gonna do it, mister! I'll cut her neck off, I swear to God!
- All right, mister, I'm doing it!
[...]