S. S. Strickland: Who?
[jabs Marty with shotgun threateningly]
Marty McFly: Marty McFly! Marty McFly! Don't you know, Mr... From school, sir!
S. S. Strickland: I've never seen you before, but you look to me like a slacker!
Marty McFly: Yeah! That's right! That's right, I am a slacker! Don't you remember, you gave me detention last week!
S. S. Strickland: Last week? The school burnt down six years ago! Now you got exactly three seconds to get off my porch with your nuts intact!