How to tell what kind of bear is chasing you:

If you're running, and you're running, and you run up a tree, and the bear follows you, it's a black bear.

If you're running, and you're running, and you run up a tree, and the bear shakes you out of the tree, it's a grizzly bear.

If you're running, and you're running, and you can't find a tree, it's a polar bear.

That's a good one, Chris.

Do you know you can tell if a pile of bear 'scat' is from a grizzly bear or a black bear?

If the scat has bear bells in it, it's a grizzly bear.