Animal Matchup - Bear vs Shark

So, which would win between a bear and a shark? Plinky asked me this, and a number of further questions popped into my busy little head - what turf would they be fighting on? What kind of bear? What kind of shark? How the hell would such a fight get started?

So, let's go through these in a steady, methodological manner. Firstly, the issue of where they would be fighting. Of course, a bear would have the upper hand - or paw - on land, and I'm pretty sure a shark would be more adept in the water, so let's make this fight happen in some sort of environment where both are at their peak- which would probably have to be in some sort of virtual environment where both can survive and move with the greatest of ease.

Now let's look at what type of bear or shark we would have fighting - in my opinion, the clear choice would be a hulking great grizzly versus a great white bastard, as this would give us an epic fight of two titans of the animal kingdom. Since we've got that sorted, lets focus on method of attack, and how the two animals hunt and/or fight. Please bear in mind that what I've learned here I've gleaned from documentaries, some of which I haven't seen for a while, so my information might be off.

From what I know, bears tend to stand up and paw at the enemies, or just in general try and swipe and bite and claw their way through any unfortunate bastard that gets in their way. The great white, however, launches itself at the target from a distance, building up speed for one huge slamming chomp that completely incapacitates and generally dicks the poor son of a bitch.

Looking at these facts, it seems to me that the shark would have something of an advantage in its tactics, because unless the bear can get in a good clean swipe in the few moments before it gets conclusively chomped and mullered, it doens't stand a very good chance. So, there's my opinion - in a fight between a bear and shark, where the odds are stacked relatively evenly, the shark would come out on top.