It's from a South Park episode. The Toilet Paper episode. I always thought that was a cracking piece of randomness. The boys are formulating an alibi to explain their whereabouts so they don't get caught for toilet papering their art teachers house. Here's the full quote (which I guess didn't fit):
Okay. Last night, all four of us were at the bowling alley until about 7:30, at which time we noticed Ally Sheedy, the Goth chick from the Breakfast Club, was bowling in the lane next to us, and we asked her for her autograph, but she didn't have a pen, so we followed her out to her car, but on the way we were accosted by five Scientologists who wanted to give us all personality tests, which were administered at the Scientology Center in Denver until 10:45, at which time we accidentally boarded the wrong bus home and ended up in Rancho de Fritas Rojos, south of Castle Rock, and finally got a ride home with a man who was missing his left index finger, named Gary Bushwell, arriving home at 11:46.