Marty: "Hey, look at that, the tombstone."
Doc: "Marty, let me see that photograph again. My name, it's vanished!"
Marty: "Hey, that's great, Doc! Don't you get it? We're goind back to the future tomorrow, so every thing's being erased."
Doc: "But only my name is erased! The tombstone itself and the dates still remain. That doesn't make sense. We know that the photograph represents what will happen if the events of today contunue their course into tomorrow."
Marty: "Right. So..."
Undertaker: "Excuse me, Mr. Eastwood. I just need to take your measurement."
Marty: "Oh, look, pal, I don't wanna buy a suit."
Undertaker: "No, this is for your coffin."
Marty: "My coffin?"
Undertaker: "Well, the odds are running two to one against you. Might as well be prepared."
Doc: "So, it may not be my name that's supposed to end up on this tombstone. It may be yours."
Marty: "Great Scott!"
Doc: "I know, this is heavy."