This is graphic ad of polar bears falling from the sky from Plane Stupid. It's supposed to make people aware of the environmental effects of flying... or something.

And people are stupid.

A polar bear attacked a woman at Berlin Zoo Friday afternoon after she climbed a fence and jumped into its habitat during feeding time, police said Saturday.

The bear attacks the woman during feeding time.

One adult polar bit her several times after she plunged into the moat, police said.

Zoo workers tossed rescue rings toward the woman to hoist her out and distract polar bears swimming nearby, said Goerg Gebhard, a Berlin police officer.

At one point the woman fell back into the water and was grabbed by a bear before she was eventually hoisted to safety.

"They saved her life," Gebhard told CNN.

The woman was severely injured and was being treated at a hospital, police said.