time traveling: remember to bring the toilet paper

As you know, I'm a bit of a sci-fi geek, and a big sucker for time travel narratives... even when they come in the form of this rather weird but amusing Chinese 7up commercial that's making the rounds.

Everybody knows that time travel is something you just don't mess with. But the poor, stubborn guy in this ad learns the hard way, many times over. And no one ever thinks, man, if I ever get to time travel, I have to remember to bring a roll of toilet paper. Smart.