Polar Bear Scares The Bejesus Out Of Visitors At The Rotterdam Zoo

Two visitors at Rotterdam Zoo have captured the moment a polar bear almost shatters a submerged pane of glass in his enclosure with a rock.

The two men, filming the side of the bear's enclosure, capture the animal swimming around before they are caught by surprise as a rock thunders against the glass.

Fortunately for the men, the pane was strong enough not to shatter. Gosh the cameraman must have nerves of steel.