Question: What does the saying "Why don't you make like a tree, and get out of here", mean?
Question: One thing I have wondered is how Marty was able to cram so much into the final hour before the lightning bolt at the clock tower which was Marty's ticket home to 1985? Just after 9:00pm George stands up to Biff, we know this because we see the clock on the wall just before George proceeds to the car where Marty and Lorraine are parked. The next time we see the time is 9:30pm with Doc standing in front of the clock noticing the storm is coming, just after 9:30pm Marty plays "Earth Angel" at the Dance followed by Johnny B Goode, Marty arrives back at the clock tower at 9:56pm. So basically in 26 minutes Marty was able to play 2 songs at the dance, wish George and Lorraine the best for the future, change out of his Zoot suite and then drive back to the clock tower to go home. The whole sequence gets even better in Back to the Future Part 2, between 9:30pm and 10:04pm Marty manages to stop Biff's goons from jumping Marty up on stage playing Johnny B Goode, he then witnesses Marty from part 1 talking to his parents and having a confrontation with Biff. Marty and Doc then chase Biff what looks to be through the outskirts of Hill Valley and eventually get the Almanac from Biff, and see Biff crash into another manure truck. Marty and Doc then have time to fly down to the future location of Lyon Estates to burn the book, and then for Marty witness the time machine be struck by lighting and the man from Western Union to turn up with the letter for Marty.
Question: Right when Marty gets back to Doc before he goes back to 1985, he's praising his dad's actions of the night. One line that's bothered me ever since I can remember is "My dad laid out Biff. He's never stood up to Biff in his life." And then the Doc pauses for a second and gets a strange look on his face and says, "Never?" To that, Marty says, "No, why?" and the Doc shrugs it off saying, "Nevermind." What's Doc thinking? The best I can come up with is that he's wondering what effects it'll have on the future, but that's a rough guess. If anyone out there knows, I'd be happy to hear it.
Question: If Doc doesn't want to know what's going to happen in his/the future, then why did he tape the letter Marty gave him in 1955, which he tore up, back together instead of throwing it away? Also why did he have it on him at the end to give to Marty, if he had no idea Marty would show up at Lone Pine Mall after coming back to 1985?
Question: Can you please explain to me how Doc got into the DeLorean from within the truck? Clearly the internal width of the truck is not capable of handling gull-wing doors whilst parked inside. He would have had to push the car out, get in, drive it back in, then remotely close and open the hydraulic door/ramp on the back of the truck. This is one of the things which really sticks out in the film for me.
Question: During the clock tower scene at the end, why is it necessary for the DeLorean to be going 88mph at the exact moment lightning hit the clock tower? When the Delorean was struck by lightning while it was in mid air at the end of the second film, it wasn't going 88mph at all, yet it was still shot through time. Seems the Delorean could have been parked in the street in front of the clock tower connected to the wire and just wait to be struck by lightning and sent back to 1985, no?
Question: Doc Brown's workshop at the beginning of the movie strikes me as highly reminiscent of the one belonging to Caractacus Potts in Chitty Chitty Bang Bang, right down to the elaborate food-dispensing mechanisms. Potts also had a dog named Edison in that movie, just as Doc has one named Einstein. Were these similarities intended as a deliberate homage, or are they just similar expressions of the "mad scientist" trope?
Question: When Marty comes back to a "new" 1985, his family has money, his siblings are now successful, they treat Marty like he never left (except to go to the lake). But before he supposedly went to the lake, didn't Marty act normal? Didn't Marty grow up with this new and improved family and have different experiences that didn't happen when they were poor? If so, why does he have no memory of this? If Marty grows up with money, has a successful father, a sister that's popular, what happens to "this" Marty? The one that grew up differently now that he was born into a richer family? (This can't be the same Marty that goes back in in time that we see at the end of the movie, because if that Marty will do everything we saw in the movie, hes the same Marty before anything changed. Like when he said his dad never stood to to Biff in his life).
Question: I'm intrigued if anyone knows what the experiment was that Doc refers to at the start. He says "my experiment worked - all the clocks are exactly 25 minutes slow". The only thing I can think of is that Doc loaded them all into the time machine or something similar - is there any official answer, or is it just a random comment?
Question: I have a question and this has bothered me for years. How did Doc know the exact date and time to wear a bulletproof vest by reading Marty's letter? We see what Marty wrote and it says "The night I go back in time" before he puts it in Doc's pocket but it never said the exact date or time of when the terrorists would attack Doc after Marty came back in 1985?