This is called, "natural selection".
I saw this before, and was pissed they shot the lion. The guy goes into the cage, the lion tries to eat him. This makes perfect sense to me. It certainly made sense to the lion. The only thing that didn't make sense, was the guy in the cage.
The lion is trying to cleanse the gene pool. Let him do his duty.
Hey. Speaking of duty. I wonder, if the lion got to eat the guy, and was taking a dump the next day, and the guys family was there watching..... the guy was obvioiusly a loser. I can hear the family now.......
"See, Daddy you were wrong. You always said Bobby wouldn't amount to shit."