This is why I always have a camera with me. You just never know what might happen. This guy got 16 photos of a grizzly chasing a bison down the road. From the looks of the bison the bear got a hold of him at some point.
http://www.fieldandstream.com/photos/gallery/hunting/2010/11/amateur-photographer-captures-grizzly-bear-chasing-bison-down-highway?image=0
http://www.fieldandstream.com/photos/gallery/hunting/2010/11/amateur-photographer-captures-grizzly-bear-chasing-bison-down-highway?image=0