Okay, so those hands are not real. I mean, of course they are real, but they are not alive. It's not a painting, it's a sculpture. It's a detail of "Ugolino and his sons" sculpture, by Jean Baptiste Carpeux, 1857. I really find it astonishing.
The story itself is quite sad. Those hands belong to a son who is grabbing his father's legs... in hell. It's taken from Dante's Inferno book: Inferno is worse than you think, it is a place where this father is jailed with his sons, and they are all left there, they know they will die from starvation. You should see the angst face of the father... The children know they are going to die, so they ask they father not to hesitate to eat their bodies so at least he can survive.
