Yeah, if that guy slipped and fell backward he could injure himself.
Here's another candidate for the Darwin Awards. Some woman decided to take a dip in the polar bear's cage at the Berlin Zoo.
Zoo keepers managed to rescue the woman after he attacked and bit her several times on the arms and legs.
In a similar incident, Premier Ed Stelmach of Alberta, Canada was accosted by a polar bear with broader ecological issues in mind.