Barefoot dude with unbuttoned shirt, to walking guy: "Hey man. Can I borrow your phone to make a call? I need to call my girlfriend 'cause..."
Guy (still walking): "I can't let you do that, man."
Barefoot dude: "Well, why not? Is it out of battery or something? Or is it because you're a stupid motherfucker?"
Guy (still walking, over his shoulder): "Yeah! The second one!"
(Overheard by DM on Congress Street)