Bernadette: Well, what if the Hulk picked up Thor while Thor is holding the hammer?
Amy: Yeah?
Bernadette: Then by the transitive property of picking things up, Hulk picked up the hammer.
Amy: No. Hulk picked up Thor, Thor picked up the hammer.
Penny: Okay, hang on. If I go to a bar and pick up a guy, and he picks up a girl, and then we all leave together, did I pick up the girl?
Amy: Did that ever happen?
Penny: Hey, are we talking about me or are we talking about Thor?