Since Tuong Lu Kim was mentioned, I have to mention two great moments from just last week:
TUONG LU KIM
Fighting his Japanese competitor (City Sushi)
Suffering from multiple personalities (City Sushi)
It's also about time we get some celebrities in here! Should somebody have enough great moments to warrant their name to be individually mentioned, I'll fix that manually. For now though, throw 'em in this category!
CELEBRITY
Kanye West using calculations on a white-board to get a joke (Fishsticks)
Tom Cruise lying dead beside Willzyx (201)
Biggy Smalls being summoned by children by mirrors (Hell on Earth 2006)
Steve Irwin arriving to Satan's party without a costume (Hell on Earth 2006)
Michael Jackson's soul controlling Ike (Dead Celebrities)
I'll also add that last one to Ike:
IKE
Being possessed by Michael Jackson (Dead Celebrities)
I should have mentioned at some point that South Park: Bigger, Longer, and Uncut also counts, so let's get Sheila involved:
SHEILA BROFLOVSKI
Singing "Blame Canada" (South Park: Bigger, Longer, and Uncut)
Unleashing her Jersey-side (It's a Jersey Thing)
Let's make three in a row for that family:
GERALD BROFLOVSKI
Getting a dolphinplasty (Mr. Garrison's Fancy New V*****)
I'd like opinions on how to handle reoccuring moments...right now I'll add them both to the first episode they're attributed to...
STAN MARSH
Puking on Wendy when she gives him attention (first seen in Cartman Gets An Anal Probe)
KENNY MCCORMICK
Dying (first seen in Cartman Gets An Anal Probe)
...should these be more specific?
EDIT: Let's go ahead and get Mr. Mackey on the board, too:
MR. MACKEY
Directing a play about tooth decay (Royal Pudding)
Searching for whoever pooped in the school's urinal (Mystery of the Urinal Deuce)
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http://img812.imageshack.us/img812/3492/eponaharr.jpg
Nominate E P O N A.