Raj: I don't like bugs, okay? They freak me out.
Sheldon: Interesting. You're afraid of insects and women. Ladybugs must render you catatonic.
___

Sheldon: Leonard, you may be right. It appears that Penny secretly wants you in her life in a very intimate and carnal fashion.
Leonard: You really think so?
Sheldon: Of course not. Even in my sleep-deprived state, I've managed to pull off another one of my classic pranks. BAZINGA!
___

Sheldon: Oh Mario ... if only I could control everyone the way I control you ... HOP! YOU LITTLE PLUMBER! HOP! HOP! HOP!