Sometimes obsession can be a good thing (scientific breakthroughs, for one), sometimes it can be a creepy thing (don't stalk me, bro), but when it comes to film, obsession is almost always a fascinating thing. After all, some movies are just too dang vague, so it takes a focused film geek to fill in the gaps. For example, how many days does Bill Murray's character spend trapped in a time loop in 'Groundhog Day'?

The film never gives us a final tally. Director Harold Ramis once stated that it must have been around 10 years, but he later amended that by saying 10 years was far too short. So what's the real answer?