Anyone with a cat has probably had to deal with this. You leave a glass of water on the coffee table, go to the bathroom and find the cat flopping around in the living room with your water glass stuck on it's head. 

Same thing goes with bears and milk cans. Fortunately for this bear, a logger with a loader happened to be in the area. Using the loader claws, the bear was freed from the can. Of course. he didn't stick around to show his gratitude.