She's not a super hero! Superman/Batman: Public Enemies
When Power Girl first popped on the screen, my girl friend and I just looked at each and said "She's not a super hero! She's a chicken boo!" Her facial expression was pure flashback to the Animaniacs.
That was followed by a "Buh-GOCK!" every time she showed up after that, and much hilarity on our part.
Any else get that reaction?