Big Bang Theory Quote
Sheldon: (trying to teach Penny physics) How can you not know? I just told you. Did you suffer a recent blow to the head?
Penny: Hey, you don't have to be mean.
Sheldon: I'm sorry.
(trying to sound more cheerful)
Sheldon: Did you suffer a recent blow to the head?
Quote from S03E10 - The Gorilla Experiment