Okay, I'm coming.
4 seconds sound clip from the The Silence of the Lambs movie soundboard.
You can hear this line at 01:40:04 in the Blu-ray version of the movie.
Quote context
[...]
- I'm gonna do it, mister! I'll cut her neck off, I swear to God!
- All right, mister, I'm doing it!
- Good afternoon. Um, sorry to bother you.
- I'm looking for Mrs. Lippman's family.
[...]