Buford "Mad Dog" Tannen: [arriving at the Palace Saloon] Are you in there, Eastwood? It's eight o'clock, and I'm callin' you out!
Marty McFly: [looks at the town clock, then steps towards Buford cautiously at a window] It's not 8:00 yet!
Buford "Mad Dog" Tannen: It is by my watch! Let's settle this once and for all, runt! Or ain't you got the gumption?