Jim: What does a yellow light mean?
"Slow down."
Jim: W h a t _ d o e s _ a _ y e l l o w _ l i g h t _ m e a n ?
"Slow down!"
Jim: (Same, but he drags out each word even longer.)
Or the episode where Elaine takes Jim as her date for the fancy recital and the scheduled pianist can't make it so Jim volunteers to fill in. ("I must've had lessons.")
I'm still cracking up. Hahahahahahahaha.