Some people are too stupid to be allowed to be near sharp objects or wild animals. Those people usually think that grown, 1200 lb polar bears are cuddly and forget that polar bears think of humans as easy prey.
A few years ago there was a zoo where they brought up two pola bear cubs. I forget if they were brother or sister or brothers. They were cute. They got to an age where they just became dangerous. They had some small pvc containers like small beer kegs. They got pissed off and started swatting them around in a furor because for some reason they got mad.
They are beautiful animals but they are predators. I think zoos suck and they should not lock animals up in confined areas. A great place is woman in TN who has a private preserve for old elephants. I think mainly Asian elephants. They are amazing animals but need lots of room to roam.