I think the bear was tired of listening to t.A.T.uhttp://kino-besti.ru/video/novinki-2012/tragedija-v-tsirke-medved-napal-na-cheloveka-medved-napal-na-cheloveka.htmlLooks to have occurred back in January 2012, but does not appear to have received a lot of media attention outside of Russia. I believe the circus name was Togliatti.It is probably likely that the bear's teeth and claws had been filed to prevent any damage in case of attack ?