I saw the South Park Bigger, Longer, and Uncut movie in theaters as a kid. I lived in a small town adjacent to a small city, and there weren't many other people in the theater. During the scene where the boys are watching the Terrace and Phillip movie and the theater-goers walk out, so did everyone else in our real life theater. It was surreal. We had a great time watching the rest of the movie by ourselves.
Around the time the movie was released I worked over nights stocking at a Toys R Us. As soon as the store closed I would connect my discman to the PA system and we would listen to music all night. One day we were working later than usual because of Christmas, no one told us the store had actually opened and Uncle Fucker was playing over the PA.
As someone from Oklahoma, the fact that Uncle Fucker has a similar melody and ending pleases me to no end. Sorry, edit to add, to Oklahoma the musical song