South Park just goofed on their joke from years ago when they interrupted part 2 (of who's cartman's dad?) for a terrance & phillip episode. They just interrupted a pt2 of some T&P the kids were waiting to see and they got all pissed.
Man, I remember the first one, I had class on Wed nights at Monmouth, and I'd go to the pub there after class to drink a few & watch it. The place was packed and people were all mad.