The bear is a solitary animal. They like their space. They live in a magic circle. They don't mind if you're like a mile away, but if you get inside their circle, they will maul you. If a bear's claw would ever strike your face, it would take your whole face right off your skull - your eyes, your nose, your lips, everything - and you would die from it.
There's something else about bears not many people know. If a bear gets hooked on the taste of human blood, it becomes a man-killer. He'll go on a rampage and has to be destroyed. And that's why you should never hug a bear.