LOL!   That's exactly when I became disappointed in this episode.  That scene desperately needed some post-mortem flatulence to punctuate it.

Towlie is by far my least favorite character, but Oprah's Minge and Gary were pretty damn funny.   They at least made that episode memorable.   The ziplining one was way worse.

You're right about Cartman - They've ruined his character over the last few seasons.   He needs to get back to his spoiled-by-mommy roots.