In nature, it's all about survival of the fittest. Big-guy predators go after little-guy prey in the mostly predictable cycle we call the circle of life.

But sometimes, nature surprises us. That's why we've put together a round-up of animal-animal encounters that didn't exactly go as planned.

Two reptiles locked in an epic battle. Only one can survive, but the victor is unclear.

In this video, a tokay gecko and a golden tree snake are tangled up over a grate in Thailand. The gecko grips the snake's head in its mouth, and the serpent wraps its body around the crawler. The snake works its way out of the gecko's grasp, and that's where things take a wicked-fast turn.

In an explosive backflip,