One of those cute, cuddly little Grizzly Bears is caught on tape digging open a Black Bear den and then, apparently, chases one of the cubs down and eats it. At 5:52 you can catch just a glimpse of the cub exiting the den and the Grizz goes in pursuit. A few seconds later mom and the other two cubs can be seen exiting and running in the opposite direction. Just judging by the cub's screams at the end of the video I believe the Grizzly caught him. Nature on full display here. NOT a Disney movie.