Gravity Falls, Season 2

Bill:
[in Dipper's body] How's about you hand that book over?

Mabel:
No way, this is Dipper's! I'd never give it away!

Bill:
Hmm, you didn't seem to have a problem taking it for your own play, or ditching him when he needed you. So come to your senses! Give me the book or your play is ruined!

[Mabel sighs and begins to hand it to him]

Bill:
There it is. I mean, who would sacrifice everything they've worked for just for their dumb sibling?!

Mabel:
[suddenly realizes] Dipper would.

Bill:
Huh?

[Mabel yanks Bill off the catwalk, sending them both falling]