Bear in Minnesota zoo hammers glass barrier with rock and shatters it

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Yesterday, as Minnesota zoo visitors watched, a grizzly bear decided to give them some action. The bear picked up a rock the size of a basketball and slammed it into the exhibit's glass barrier.

Robin Ficker, a visitor from Maryland, said he was watching “the bears wrestling with each other and looking at the people” shortly after the zoo opened at 9 a.m. Then one of the animals “picked up from the bottom of the pool a rock that had to weigh 50 pounds. And while many people were standing there, he slammed it against the glass several times,” Ficker said.

According to one of the zoo's employees, Tony Fisher, the bear was just clowning around. "He didn't know what he was doing. He was just being a bear." Maybe. Or maybe he had something else on his mind.

No one was hurt, and the exhibit is temporarily closed until the zoo can fix the pane.