Hot Tub Time Machine says F U to time-travel science

Let's be honest: We're not going to go see Hot Tub Time Machine for an in-depth analysis of time travel. The story of four dudes who go back to the '80s via a Jacuzzi to relive their youth is an excuse to marvel at how different the '80s were and, oh, yeah, naked boobies.

But the movie does deal with the paradoxes of time travel: The characters must be careful not to change the future, though one of them wants to set himself up for life a la Back to the Future Part II.

Rob Corddry plays one of the time travelers and tells us he was involved with the decision to tone down the sci-fi. "It's definitely not, like, a geekfest," Corddry said in a group interview last week in Valley Village, Calif., on the set of his Adult Swim series Childrens Hospital. "We got together, and there was this writing meeting, like a roundtable, and we talked about time travel for, like, five hours. And then realized that there's no way to write a time-travel movie where it totally works out, where all the logic works out. If you could do that, then you'd basically figure out time travel."

The consensus after that brainstorming session was to just stick to being funny. "That meeting finished as all of those meetings for every time-travel movie probably do, which is 'Ah, f--k it. Let's just make jokes,'" Corddy said.

If you've seen the trailer to Hot Tub Time Machine, below, you've also noticed a strange guy in a bear suit jumping into the tub and frolicking with the boys. Corddry spilled the secrets of that bear.

"The bear character kind of took on a life of his own," Corddry said. "It became a major, major character in the movie somehow. I don't know. It doesn't make any sense. They spent a lot of money on the bear costume, so they had to work it a lot. A squirrel makes it into the movie a lot, too. I have no idea what the squirrel is doing there."

Hot Tub Time Machine also stars John Cusack, Craig Robinson, Clark Duke and Chevy Chase. It opens March 26.

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