 Stan points a gun to Kyle and reveals that he was the one who defecated in the urinal (his reason for doing so was that the stalls were full and he did not want to miss recess).He decided to blame the government for the urinal deuce, and the government was happy to take the blame, just as with 9/11.Kyle then asks who was "truly" responsible for 9/11, and Stan replies it was "a bunch of pissed-off Muslims."