When he runs that stop sign and Anthony, in the back, just laments it like its that very last thing he needs right now. I also love the way Dignan is just eyeing Bob the whole time like hes the biggest horse's ass on Earth.

Another fave is this part:

Dignan: Bob Mapplethorpe, potential get-away driver: go!
Bob: Well, I think there's a real air of mystery about me.
Dignan: Don't complicate it. Your number one strength is you have a car you can provide. Sell yourself! Start over. Ready, go!
Bob: Okay, alright. I'm a risk taker! I'm growin' an entire crop of marijuana plants in my parents back yard! I think that shows...
Dignan: Wait, you're growing an entire crop of marijuana in your back yard?
Bob: Dignan, look. I'm just not very good at this selling-yourself stuff, okay? So, I'm just gonna tell you the truth. I really wanna be a part of this team. And I'm the only one with a car.
Dignan: That's good. That's good. 'Cause that hits me right here. (points to heart)


But the one I use to sum up to people what the humor of the film is like is:

"You know there's nothing to steal from my mom and Craig!!"

Just some intelligent, sensitive, and frustrated young men who for some reason want desparately to have some sort of crime caper adventure.