I think there's already a thread on this .
Back in the '70s, we had a drug-crazed guy at the Los Angeles Zoo climb over the back wall of the Lion enclosure and jump in. Needless to say, they were picking up body parts in the exhibit for the next few days. At least what was left of him! You can't fault the animals for attacking when their space is invaded.
In the video its interesting to see the Bears' behaviour too while she is being rescued.. All three(?) are clearly very interested with their little ears pricked forward as if to say 'what's this, new enrichment?' But only one is still up front making any actual contact with the unfortunate lady- who by then is presumably seriously regretting her action. Maybe that is the dominant animal and the others give way to it?
Both London and Whipsnade in the UK have had invaders in the Lion enclosures.
I believe at London a man jumped into the enclosure with a Bible to protect him. He was attacked, but was rescued.
At Whipsnade, a man used to boast that he knew the lions well, so someone challenged him on it and threw his hat into the enclosure for the person to fetch. Person climbed in and was killed after banging his head onto the ground.
In June 1956 a cub scout was killed as he and a friend climbed the safety barrier and were poking a sleeping lion(ess?) through the bars with sticks. He died a few days later from his injuries
Jambo, being the dominant male, was the only one of the troop to go towards the child and the rets of the troop stood back (apart from the adolescent male when the rest of the troop had been shut inside)
In the uncut version of the video it begins with a quick shot of Jambo, walking upright as he actually carries a juvenile AWAY from the area where the boy has fallen, and then puts him down. I find that amazing. Then he approaches the boy and it looks as if he positions himself to block the female & youngster from getting nearer, presumably for their own safety.
The young male 'Hobbit' was either let out by mistake or they had to let him out so as he wasn't next to Jambo indoors- I never found out which. Clearly he was aggressive though and was getting nearer to the boy on each run across the enclosure. In that situation the keeper with the stick was a pretty brave guy.
I actually blame Berlin zoo for that (I know what I'm starting here) I don't if she jumped or not she could fall over that 2-3feet barrier while looking down easily as well. I especially don't get those comments "I wish the bear would kill/eat/hurt her more and she would remeber or anything", that's plain stupid and tells a lot about such a person.
And of course if how Knut was treated made public feel that polar bears are just cuddly cute funny looking creatures not dangerous at all, it's Berlin again to be blamed.
She had to climb over a fence, a line of prickly hedges and a wall to get in.