Penny: Okay, I got a box, but there's no key in here. Just letters.
Sheldon: That's the wrong box. Put it back.
Penny: Oh, Sheldon, are these letters from your grandmother?
Sheldon: Don't read those letters.
Penny: Oh, look, she calls you Moon Pie. That is so cute.
Sheldon: (shrieking) Put down the letters!