Hot Tub Time Machine

Question: When the four main guys are first coming down the slope in 1986, the two from the ski patrol apparently don't recognize Jacob's snowboard. Though snowboards were still largely unknown in 1986, wouldn't someone who worked for a popular ski resort recognize them?

zendaddy621

Chosen answer: The James Bond film "A View To A Kill" came out the year before in 1985. In the film, Bond's snowscooter is blown up by the Soviets, so he takes a wrecked ski from it and improvises it into a snowboard. Snowboards existed at the time, however, it wasn't until that film that their existence became well known. One year later in 1986, they'd still be very rare, but it's likely that his wasn't the first that the ski patrol had seen.

Captain Defenestrator

Question: Considering that there are many different theories about how time travel works, such as the grandfather paradox, temporal paradox, etc., why did Adam assume that the butterfly effect was the primary rule of time traveling?

Answer: It's just the rule they used for the movie; not a lot of thought was put into the time-traveling rules with the obvious inconsistencies the movie has throughout regarding it, especially in the ending.

lionhead

Factual error: In the scene where they are watching "The Drive", the TV is not showing an NFL game at all. The field is 110 yards long. There is an overhead shot of the field and you can see two 50 yard lines and a C in the middle. They are watching a CFL game.

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Adam: One little change has a ripple effect and it effects everything else. Like a butterfly floats its wings and Tokyo explodes or there's a tsunami, in like, you know, somewhere.
Jacob: Yes exactly. You step on the bug and the fucking internet is never invented.
Lou: Oh then you'll have to talk to girls with your mouth.
Jacob: Yeah. No. I was more concerned about bigger consequences like not being born.
Lou: Yeah. No. I don't care about that.

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Trivia: Chevy Chase makes his first appearance; he farts. This goes back to the movie Spies Like Us when he is taking the test and he farts during the test, blaming it on the guy sitting next to him. The guy says, "Excuse me," as everyone looks at him.

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