A chlorinated, R-rated “Back to the Future,” “Hot Tub Time Machine” accomplishes what “Snakes on a Plane” did not: It offers a merrily idiotic movie to go with its willfully idiotic title.

A good amount of silence too. Bags don't come much more mixed than this. Jump into your time machine – hot tub or otherwise – and hop back to March 2010. That’s when the world was graced ...