A woman is lucky to be alive today after she jumped a fence Friday at the Berlin Zoo to enter the polar bears' enclosure during feeding time and was subsequently attacked by one of the bears, said one zoo expert. After long, panicked seconds in the bears' moat with one of the massive animals biting at her backside, the woman was eventually pulled to safety and treated for severe injuries. “What she's done here, she should thank the good Lord she's alive,” Jack Hanna, director emeritus at the Columbus Zoo in Ohio, told “Good Morning America.” “It's amazing to me.”