http://www.warnet.ws/news/30439

I think the only trick is: Basically, keep the bear very well fed…

Either that or surgically plant a bomb in the bear’s chest, then you constantly remind the bear, that if the radio in YOUR chest suddenly stops transmitting your heartbeat, the bomb will detonate.

It would probably be smart to actually have the dual medical procedure filmed, because invariably, the bear will begin to doubt your seemingly idle threats and eventually question if there even IS a bomb at all… and that is a classic mistake that even seasoned bear handlers haplessly make.