Bernadette: Sheldon, when was the last time you got any sleep?
Sheldon: I don't know, 2/3 days, not important. I don't need sleep, I need answers. I need to determine where in this swamp of unbalanced formulas squatteth the toad of truth.
Penny: Toad of truth? Is that a physics thing?
Leonard: No, that's a crazy thing.