Hot Tub Time Machine is a 2010 American science fiction comedy film directed by Steve Pink and written by Josh Heald, Sean Anders, and John Morris.

The film stars John Cusack, Rob Corddry, Craig Robinson, and Clark Duke as four men who accidentally time travel back to 1986 using a hot tub and must find a way to return to 2010.

Adam, Lou, and Nick have also assumed their younger bodies, though Jacob's appearance is unchanged since he was not born yet and he occasionally flickers in and out of reality.

To minimize the butterfly effect, the group plans to re-enact their previous experiences: Adam has to break up with his girlfriend Jenny and get stabbed in the eye with a fork, Lou must pick a fight with and get beaten up by ski patrol bully Blaine, and Nick must have sex with a groupie and perform with his band at an open mic.

Lou leaves Kelly to find Blaine, who he finally beats, and the four retrieve the energy drink and return to the hot tub where they create a vortex.

Jacob and Nick enter the tub first, but Lou decides to stay in 1986, admitting to Adam that his carbon monoxide poisoning was indeed a suicide attempt.

Back in the present day, Adam, Nick, and Jacob find that Lou has changed history by creating the immensely successful company Lougle, which affords him a luxurious life with Kelly.

[14] The website's critical consensus reads: "Its flagrantly silly script – and immensely likable cast – make up for most of its flaws.

[16] The New York Times critic A. O. Scott stated: The picture moves so quickly and crazily, swerving and skidding and doubling back for seconds, that minor lapses in wit are immediately overtaken by major (and therefore hilarious) lapses in taste... the undercurrent of misogyny and homophobic panic that courses through most arrested-development, guy-centric comedies these days is certainly present here.

[17]Roger Ebert gave the film three stars out of four: The bottom line is, gross-out guy comedies open twice a month, and many of them are wretched excesses.

[18]The soundtrack for the film, officially titled Hot Tub Time Machine (Music From the Motion Picture), was released in 2010 by Rhino Entertainment.

The following songs were featured in the film, but not included in the soundtrack album:[19] Although not a huge commercial success, strong home video sales prompted a sequel to Hot Tub Time Machine.