I liked the little victory dance Elaine does after making a really cutting remark:
Jerry: What makes YOU an expert on breasts? How many breasts have YOU touched?
Elaine: Well. I've touched mine.
Jerry: So have I. <smirks>
Elaine: Oh yeah, I forgot. <Jerry's face falls, Elaine dances>
I also liked George's little hand gestures behind his girlfriend's back.
"I guess when you've got five million Muslims after you, you've gotta stay in shape!"
-Slippery Jim