One cameraman had a close encounter with an angry polar bear, and it was all caught on tape.

The man had constructed a glass cage so that he could get as close to the bear as possible without getting hurt. The bear wasn’t easily discouraged by the contraption, first trying to open the door, then trying to bash it open, and then shaking the cage with all of her might. The bear tried to get at the man for 45 minutes before she gave up. Polar bears are one of the few animals that view humans as food.