Attacks on humans seem to be more or less expected grizzly behaviour, but it seems strange in a tranquilized bear. It must have been resentful of the darting experience and looking for payback, or fearful of a repeat experience. Black bears are far less likely to attack but are somewhat more worrisome because they live in great numbers around human settlements, here in Canada and parts of the USA. Playing dead is almost the only (unarmed) defense against grizzlies but when hapless tenderfoots try that with black bears, the bear sees a good thing and proceeds to chow down. The best tactic with them is to act threateningly and if it comes to it fight back like a maniac- they have been driven off by 10 year old girls. I wouldn't care to live in an area with a mixed population of grizzlies and black bears: you could doom yourself in the time necessary to check the critter's anatomy.

On the sporran issue, it has to be said that one bear could make perhaps dozens of sporrans whereas small animals like mink etc are one life per. Bear fur, the humane choice!