Hot Tub Time Machine
Basically, three down-on-their-luck guys, along with a nerdy nephew, decide to head to have a heavy night of boozing in a ski-resort hot tub (not just a clever title see?) and wake up to find themselves young and carefree in 1986. This provides a sweet opportunity to transform their future bad fortunes (and, for nephew Jacob, to ensure he is born)
Despite sounding a little bit stupid, this actually looks pretty funny.
John Cussack, Rob Corddry, Craig Robinson
Think The Hangover. But with time travel