You have to keep the bear outside of your white circle.. and as he dose brutal mauling on your partner start charming.. your partner runs away from you a bit the bear trys to break charm but as hes running away it doesnt work.
if you dont belive me i put up a screenshot.
The guy was advertising him self he said hes done it a few times
Korgoth The Slayer he said he can do it and he did for me so in game msg him and get a bear!
