Sheldon: Oh, Leonard, there you are. I need you to check my head for chair lice.
Leonard: I did it last night, I'm not doing it again.
Howard: Just his head, right?
Leonard: I don't want to talk about it.
You didn't catch bugs from Penny's chair.
Sheldon: Yes, I did. And now they're cavorting at the base of my hair follicles, like dancing hippies at the Redwood National Forest.
Leonard: Sheldon, you do this all the time. You fixate on some crazy idea and then blow it way out of proportion.
Sheldon: Name one time I have ever done that.
Leonard: How about the time you put GPS trackers in your garbage because you were convinced that North Korean spies were stealing your doodles? The chicken nuggets you were sure were human nuggets. The strangely shaped cloud that was following you around town. The time you put on my shirt by mistake and were convinced that you started growing again.
Sheldon: I said name one. You really need to work on your listening skills.