Marty McFly: [Doc has just been shot. Marty runs over to him] Doc! Doc!
Marty McFly: [Marty turns Doc's body over to reveal it is apparently bullet-ridden and lifeless. Marty begins to cry] No! No!
Marty McFly: [Doc suddenly blinks and sits up] You're alive.
Marty McFly: [Doc unzips his radiation suit to reveal a bulletproof vest underneath] Bulletproof vest? How did you know? I never got a chance to tell you.
Marty McFly: [Doc smiles and removes a weathered piece of paper from his pocket. Marty unfolds the paper to reveal it is the warning letter he had written in 1955, taped back together] What about all that talk about screwing up future events? The space-time continuum?
Dr. Emmett Brown: Well, I figured, what the hell?