Question: When Marty is playing the guitar after he get fired in the future, Jennifer is trying to sneak out and while he's playing, she stops and turns around to look at Marty. Why does she do this? It made no sense, she could have been caught. Was he playing their "special" song or something?
Question: Two questions: something I have never understood about Marty traveling into the future to stop his kid from going to jail. In the first movie when Doc. puts his dog into the time machine and sends him 1 min into the future the car disappears for 1 min and arrives back with the dog in the car. Doc explains that as far as the dog is concerned the trip was instantaneous but to Marty and Doc the dog disappears for 1 min. The question is when Marty travels into the future shouldn't he have "disappeared" for 30 years and not had an older self. The second question is, why is it so important for them to travel 30 years into the future to stop his kid from getting arrested, couldn't he have just as easily told Marty "hey on this day and year, don't let your kid leave the house. You have 30 years to figure out a reason or break his leg."
Question: Has anyone an idea about what kind of car is this one which almost hits Marty McFly Jr. as he runs out from Cafe 80's? For me it looks like Renault or Mazda, but I'm not sure, though I I can swear it must be some future descendant of the really existing nowadays car. Does anyone recognize any other familiar car in future vehicles? :).
Question: When the DeLorean travels through time, it arrives in the same place it leaves from, only in a different time (eg. In BTTF, Marty leaves Twin pines mall in 1985 to arrive on the farmland it was built on in 1955. In BTTF3, Marty leaves 1885 on the train tracks above the ravine and arrives on the completed bridge in 1985) So, at the end of BTTF2 where Doc and the DeLorean are struck by lightning and sent back to the past, the DeLorean would be arriving mid-air. The problem is, Doc states in the letter that the lightning destroyed the flying circuits. So, the DeLorean would have plummeted 50 feet to the ground when it arrived in 1885? Why was it not damaged when Marty found it in mines 70 years later?
Question: OK, hope I'm articulating this properly: when Marty returns to 1985 from 2015 with Jen and the Doc, he places Jen at the porch of her own home. At this point, he hasn't realised yet that he's actually in an alternate 1985, because old Biff has discovered the time machine, and taken the Sports Almanac to the Biff of 1955. We all know what happens from there: Marty and the Doc now have to go back to 1955 (again) to stop Biff from getting the almanac, thus making the upcoming 1985 timeline "correct." Well, as they are successful...how come Jen is OK? Surely, as she was left in the alternate 1985 and isn't really in the "correct" 1985, she now fails to exist when Marty comes back to the "correct" 1985 to collect her at the porch? She must disappear with the alternate 1985? Or am I over thinking this?
Question: When the old Biff gives the Sports Almanac to his younger self, he cautions him that in the future, a teenage kid and an old man claiming to be a scientist will ask him about that book. The old Biff surely knew who they were; why didn't he give his younger self their names, Marty McFly and Doctor Emmet Brown?
Question: Why does Biff travel through the outskirts of Hill Valley to get from his home to Hill Valley High school? Biff travels through what looks to be the countryside through the River Road tunnel to the school and he is travelling through the countryside when he heads home from the dance as well. It almost suggests that Hill Valley High is in another town. One could say the road Biff took in 1955 may be a populated area in 1985 but it doesn't really make sense to have the school so far away from the town center, the movie gives the illusion Hill Valley high school is in another town. The only logical answer I could think would be that Biff actually lived in another unnamed town in 1955 and drove into Hill Valley to attend high school, perhaps he was kicked out of the neighbouring town high school. Although that doesn't work that well, as we watch Marty follow Biff from his home to the town square.
Question: In 1985-A, when Biff threatens to shoot Marty, Marty says that the police would match up the bullet with the gun. Biff mentions that he owns the police and that they couldn't match the bullet with Biff's gun. How could the police be unable to match the bullet that murdered George with Biff's gun?
Question: At the beginning of the movie, as Doc, Marty and Jennifer are leaving in the time machine to go to 2015, Biff sees the DeLorean fly and then disappear. It perplexes him greatly and he even states, "What the hell is going on here?" 1) Why wouldn't Doc have been more careful when he knew that anyone could've walked out of the McFly house and seen the DeLorean? 2) Why didn't it alter things in the future? Sure, Biff may not have told anyone about what he saw, but it's unlikely since he witnessed such a strange event.
Question: When Marty suggests (in 1985A) that they go back to 2015 to stop Old Biff from taking the almanac in the first place, Doc says no because it'll be 2015A instead. When Old Biff went from 2015 to 1955 to give himself the almanac, when he came back to 2015 again, it was still the same one he left because Marty and Doc are just getting Jennifer out of the new McFly house when he returns. So what's the difference? If Biff can go from 1955 to 2015, without it becoming 2015A, then why can't Marty and Doc do it from 1985A?
Question: When Doc and Marty go back to 1985, after going to 2015, they land and find out that it's an alternate 1985 wherein Biff is in charge. Someone said in a question that when they returned, shouldn't they have seen Biff's casino as they fly over Hill Valley - is them not seeing the casino there to mislead the audience into thinking nothing has changed or is it a mistake?