Big Bang Theory Quote
Penny: Okay, here's the deal: you either you help me throw Leonard a birthday party, or so help me, God, I will go into your bedroom, and unbag all of your most valuable, mint-condition comic books and, on one of them, you won't know which, I'll draw a tiny little happy face in ink.
Sheldon: You can't do that! If you make a mark in a mint comic book, it's no longer mint.
Penny: Sheldon, do you understand the concept of blackmail?
Sheldon: Well, of course I... Oh... Hey, I have an idea: let's throw Leonard a kick-ass birthday party!
Quote from S01E16 - The Peanut Reaction