You swear on your mom's life that you didn't touch it then!
5 seconds sound clip from the Step Brothers (2008) movie soundboard.
You can hear this line at 00:19:44 in the Blu-ray version of the movie.
Quote context
[...]
- I know you touched my drumstick, because the left one has a chip in it.
- You fucking crazy, man? You sound insane, do you realize that? You should be medicated.
- Fuck you, Brennan. I know you touched my drum set. And I wanna hear that dirty mouth admit it.
- You get out of my face, or I'm gonna roundhouse your ass.
- You swear on your mom's life that you didn't touch it then!
- That's because you fucking touched my drum set!
- Because I know Cops doesn't start till 4.
- I'm going upstairs. Because I'm gonna put my nut sack on your drum set. Okay?
[...]