Well, who knows what the fuck they are messing around with genetically - crossbreeds/hybrids. Fucked up surgical procedures/head transplants? Is the human centipede/saw more of a documentary? Drug/paralyze a person so they can watch/be conscious as they are eaten.
Why Ringmaster? Do they have some kind of show? How fucked up do you want to get. Place your bets - fight to the death - 10 x 10 yr olds vs 20 x 5 yr old children. How long can 20 kids survive against a tiger? 1 adult vs 10 kids with weapons.
Once you get magnitudes worse than that I don't even fucking know.