Penny: Damn you, you rat bastard!
Leonard: Are you drunk?
Penny: Zack was a perfectly nice guy and then you *ruined* him!
Leonard: How did I ruin him?
Penny: 'Cause in the olden days I never would have known he was so stupid.
Leonard: Come on, he wasn't that stupid.
Penny: Yes he *was*! He thought you were going to blow up the *moon*!
Leonard: Okay, yeah, he's stupid
Penny: He spent the entire night bragging about how *he* invented the word appeteezers!
Leonard: (still laughing) Well, how is that my fault?
Penny: You have destroyed my ability to tolerate idiots, now come with me.
(grabs Leonard's hand and starts pulling him behind her)
Leonard: W-where are we going?
Penny: (shouts) We're gonna have *SEX*!
Leonard: Wha- I mean oh, OK.
Sheldon: (comes out of his bedroom) What's going on?
Penny: Put on your noise cancelling headphones, this is gonna get *loud*.
Sheldon: Ach, not *this* again.
(goes back into his room)