Bet on the future? Torment your exes? Relive childhood, this time as a mildly creepy adult? Invent the Internet? The time-traveling device known as the Hot Tub Time Machine will exfoliate, relax, and ensconce you in the DayGlo universe of 1986.

Some ideas below.

And some warning signs that you may be using the device improperly below.

Hot Tub Time Machine, starring John Cusack, Rob Corddry, Craig Robinson, and Clark Duke, hits theaters Friday!