There are two classics that come to mind:
Where he goes nuts when Mary Hart is on tv.
And when the Jerry's new air conditioner falls of the window and he scrambles to save it.
Damn funny.
There are so many more. Trying to sit down in the tight jeans, playing Santa at the mall and telling the little kid about communism, imitating Jordan when he's with Elaine waiting to be picked up for the Knicks-Bulls game (which of course they never go to). The list goes on and on...........