You want to know why I pulled you over? Littering.
6 seconds sound clip from the Super Troopers movie soundboard.
You can hear this line at 00:06:14 in the Blu-ray version of the movie.
Quote context
[...]
- You know how fast you were goin'? (2)
- You want to know why I pulled you over? Littering.
- Officer, that-that's not ours.
- Littering and smoking the reefer.
[...]