Corrected entry: Near the end when Biff is waxing the BMW, it is close to the garage door. But when the family goes back inside less than a minute elapses and suddenly Biff brings in the book shipment and then gives Marty the keys to the truck. When Marty goes out the front door, the BMW has now suddenly moved to the far side of the driveway. There wasn't time for Biff to finish waxing, accept the book shipment, and move the BMW in less than a minute.
Corrected entry: The rods of plutonium are transparent red, whereas real plutonium is a silvery metal.
Corrected entry: When Marty is recovering from being hit by the car, his mom continually refers to him as Calvin. When Marty asks why, she responds "Well thats your name isn't it? Calvin Klein. It's written all over your underwear." But when Marty puts his pants on, we see his purple underwear and there is nothing written on them.Gavin Jackson
Corrected entry: Following the mistake about the menu design in the cafeteria, look at the background. The sun has moved a lot. Look trough the window and you'll notice the shadows were a second before was sunny. (00:38:15)
Corrected entry: When Marty is driving the time machine trying to escape the Libyans, he shifts gears to get up to the speed he wants. Yet when Doc puts Einstein in the time machine he never shifts gears at all and he power brakes, which can only be done with an automatic, there isn't even a device on the remote control to shift.
Corrected entry: When Doc shows both his watch and Einstein's watch, the time is 1:19 a.m. From that time, to the time Einstein goes into the future which is 1:20 a.m, is really 1 minute 45 seconds. (00:19:45)
Corrected entry: In the opening scene where Marty plugs his guitar into the gigantic amplifier, there is no feedback - if he was standing that close, at that volume, with that amount of overdrive, there would be some ridiculously loud feedback almost instantaneously. The pickups on an electric guitar will feedback the output from a speaker just as easily as a microphone does.
Corrected entry: When Doc and Marty go to Hill Valley High School in 1955 (to look for his parents), the bell rings and everyone in the corridors leaves and goes into several classrooms. About 2 or 3 minutes later, when Marty and Doc are discussing how to get his parents together, the bell rings again and everyone in the classrooms comes back out to the corridors. It can't be because of registration because when Doc and Marty arrive, the bell is heard ringing and people are in the corridors suggesting that either registration or a lesson had just finished.
Corrected entry: The morning after Marty has returned from 1955, there's a shot of Biff waxing George's car. Behind Biff we see his "Biff's Auto" yellow truck, however when Marty goes to the garage to see his new pickup truck, Biff's yellow truck has suddenly disappeared. He couldn't have suddenly left - he'd just been given a severe talking-to about not doing the second coat of wax yet.
Corrected entry: On the DVD version, in the scene where Doc gets shot and then later reveals to Marty that he was wearing a bullet proof vest. A vest does not work in the way shown in the movie. It doesn't repel bullets (as shown in the "impact points" in the vest he displays), it absorbs them. Read how a vest works from howstuffworks dot com and you'll see what I mean. In addition, it looks like he is wearing only a Threat Level 2a class vest. An AK47 or similar weapon with a 7.62mm round would go clean through the vest, through Doc, and out the other side thus killing him and ending the story. The only style of vest that can withstand that sort of impact is a Threat Level 3 class vest (the style that specialized units in the military wear). This style is very bulky and is extremely difficult to conceal like Doc did. In addition, it has a ceramic plate in it which would have shattered upon the first impact and failed to protect against multiple impacts from that kind of weapon, and definitely not show "impact points" of twisted metal.
Corrected entry: At the very beginning of the film we see the machine Doc has invented to feed his dog. It takes a can of dog food and positions it under a can opener, and the lid is held by a magnet after it is cut off. The machine then tips the contents of the can into a bowl which holds three or four days worth of dog food, indicating that nobody has been around for a while. So, who has been removing the lids from the magnetic holder?
Corrected entry: California license plates only allow for 7 letters. But the Delorean has a California plate with 8 letters (OUTATIME). (00:18:15)
Corrected entry: When Marty is in the Delorean ready to go back to 1985, he gets upset that Doc Brown tore up the letter and that he didn't have enough time to warn Doc about his future death. When Marty realizes that he can use the Delorean to go back early and warn Doc Brown of 1985 that he will be killed, Marty says,"Ten minutes oughta do it." Marty actually gives himself eleven minutes.
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