(as Cartman lies on the proctocologist's table, the alien anal probe emerges from his ass and opens up)
Cartman: OHHHHH JESUUUS OWWWWW OHHHHH
Stan: Cartman, are you OK ?
Cartman: You know that feeling when you take a really big dump?....sweeetttttt
(At this point the anal probe folds up and tucks itself back in Cartman's ass)
Cartman: OHHHHH JESUUUS OWWWWW OHHHHH
Stan: Cartman, are you OK ?
Cartman: You know that feeling when the dump goes back in? OF COURSE I'M NOT OK!!!
edited to get the fucking quotes right....
