Changing the order

DAN: John, you can't change people's orders, dude. JOHN: They'll appreciate the changes when it's done.
DAN: But... the customer is always right. JOHN: Screw that. My idea is BETTER.
JOHN: I change what I want, when I want, if it'll improve the piece. I run my life like I run our band. DAN: Yeah...
DAN: ...our band's not very SUCCESSFUL though. JOHN: The new rule is: the customer is NOT always right, and is usually an IDIOT.