I'll see if I can find it but there was a short by this exotic animal collector (kind of like tiger king) and he said brown bears were the only animal he had that he wouldn't enter the enclosure of (he had tigers and lions) because even a playing around brown bear can accidentally kill you way easier than the other animals (their hides and skin are so thick that a playful swipe between bears is disemboweling a human)
@Fujishiro @SakazOuki