I don't understand why you'd want to kill a creature like that in the first place. What he did was basically on the same level as killing a zoo animal (or attempt to since he didn't actually take the fatal shot); it's one of the least impressive "feats" anyone could ever brag about.
Hunting has its places, like population control (i.e. deer hunting), and that I don't really have an issue with that. However, with the lion, there was absolutely no reason whatsoever to kill a defenseless creature like that. I just don't get it.