That's a time lapse video of a dead gecko being completely devoured by a colony of ants in a matter of hours. And while even just the idea of that sounds kind of dark and fucked up, it doesn't do justice to the nightmare-inducing images of seeing it in full motion. Especially when those demonic little bastards swarm in and completely cover its body.
If you want to imagine a scenario even creepier, pretend there's no gecko under there.
Pardon me for a second, I have something I need to do real quick ... GAAAAAAH! MOTHERFUCKER! NO, FOR THE LOVE OF CHRIST, NO! I CAN FEEL THEM ON ME!
Sorry about that -- what were we talking about again? Oh yeah, the GAAAAAAH! FUCK, THAT'S DISGUSTING! FUUUUUUCK! Sorry, that was the last one. I think I'm good now.
Oh, yeah, the ants. It's not just the way they devour it so quickly. Around the 26-second mark, notice how the toes start to move around as the ants push and pull them into a better eating position. Then casually saw them off with their freakish, razor-sharp ant faces and carry them away. Little toes, disappearing in time lapse, one at a time, to feed to their bastard ant babies.