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YMMV: Hot Tub Time Machine
  • Big Lipped Alligator Moment: Jacob is running to find his companions. Suddenly he is dancing with a girl and asking if he can text her. The girl is never seen or mentioned again.
    • The girl does show up in a deleted scene, in which she asks Jacob about his snowboard. The scene of them dancing makes a little more sense after watching the deleted scenes.
  • Critical Research Failure: Motley Crue's "Home Sweet Home" was already released in 1985; a year before it would have been possible for Lou to create the song.
    • The recording shown is from a live show, it's more implied that he somehow took over the band and changed the name possibly due to his great song ideas thanks to his future knowledge.
    • A poster for Rambo 3 is seen on Blane's bedroom wall, despite the film being set over two years before Rambo 3 was released in May of 1988.
    • Poison performing at Kodiak Valley is seen as a big deal and April is covering the band for Spin Magazine, but in 1986 Poison had not yet achieved mainstream fame (that wouldn't happen until 1987).
    • Blaine references 21 Jump Street when he's arguing that the mains are Commie spies, but that didn't debut until 1987.
  • Crosses the Line Twice: A screaming, obscene phone call to a nine year old girl becomes a character's Crowning Moment Of Awesome.
    • There's also the revelation that Lou is Jacob's father.
  • Family-Unfriendly Aesop: The gang using their knowledge of the future for their own personal benefit results in all of them having much better lives than they did before.
    • Well, the movie has a stronger adherence to Rule of Funny as opposed to any moral.
  • Harsher in Hindsight: Adam's quote: "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".
  • Jerkass Woobie: Lou when he calls out Adam for being such a poor friend and never being around when he needed him. After a brief argument, Adam gives in and admits that Lou's got a point.
  • Xmeets Y : The Hangover meets Back to the Future.

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