Charlotte: I DON'T DO WHYs!!! WILL: Well, you have to! You just have to!!
And...
Will: I came to apologize again Sa5m: Just. go. (the tone of Vanessa's voice was...I can't even find the right words! TOTALLY...bitchy? in a good way? lol)
The Joker line was great, but my absolute favorite was:
"I do kinda feel like Clark Kent."
Funniest thing I had heard in a long time. Here we have the geek who has seen or read Superman and starts using a Clack Kent analogy, and the badass admits he feels like Clark Kent without blinking. xD
The Joker line's even funnier if you watch the commentary. In it, the director mentions that Ben's band (minus him) is actually a real life band called... Joker. The guitarist that says the line is the band's actual lead singer. So it's a doubly clever line because it's an allusion to the band name.
I loved the scene where they were all sitting up against a fence in a field...and Sa5m was talking about the universe and free will, and she was like "I mean, am I really moving my hand? Or was it predeterminded by a force I'm not even aware of?"
When the crowd is chanting "Dewey, Dewey, Dewey" the camera cuts to a simple-looking fellow who not understanding exactly what is going on, chimes in with, "Doodie". Priceless. Every time I watch this movie, I lose it when he says that line.