There were two things I was going to do after seeing that. 1. Send it to Art and 2. Post it to BCP. The only reason I didn't do #1 is because I knew you followed this thread. Crazy stuff. Makes me think twice about the stories I've heard where bears don't go up trees after someone. Not that they aren't true, but more so that the bear was just messing around or something. Clearly they have no problem doing it.
Dominance behavior is so rad. I didn't get to see it much of the coolest stuff (cowboy walking, tree rubbing) but was always impressed when I did. Assuming the video is fairly recent, that huge bear would probably be either bear 747 or 32. Those two are really big boys and from what I have been told (and sorta seen on the bearcams) have been playing more dominance games since I was there.