Marshall: You were always testy when challenged... Ya know, I was talking about that with Amita...
Charlie: You were, were you? Marshall, do whatever you like... just you remember... Amita's a sharp mathematician so no matter how you try you're never gonna to get her to believe that this (holds up two fingers an inch apart) is six inches.
Marshall: (smirking) I bet with you that subject's never come up.
Colby: (to David) ooooo... math fight!