There were (maybe still are) a set of youtube videos which are copies of either an 8mm or 16mm ciné film made in Africa by a group of Belgian (?) tourists in Land Rovers.
The first film is brief and shows the caravan stopping in treed grasslands amidst lions resting in the shade. One of the tourists gets out, a man, and walks into the group of lions while making photos. One of the lions gets up, puts its front paws on the man's shoulders and pushes him to the ground. The other lions approach. This is where the first film ends.
The second film is actually the entire film, uncut. What it shows are the lions tearing this guy apart, live.
Without realizing there was the second version, I showed the first to a co-worker, whose wife is a veterinarian who owns and manages a cat-clinic. Both her and her husband (my co-worker) have been to Africa numerous times. She has stood amidst playing lions and amidst the very dangerous Cape Buffalo. He had some of the photos in his office - I could see they were made with a very wide angle lens, so she was easily not more than eight feet from them, in a group. She was not afraid and the animals did not threaten her. They do this on every trip. Anyway, he sent her the youtube link, but accidentally sent her the second gruesome one. He was freaked out, but I don't think she cared.
When I've gone to the zoo, I'm convinced I could join the big cats and be friends. I only worry about tigers; they are scary.