Stunning mutations, shocking survivors and freakish feats, all caught on film. These stories are so bizarre that they seem impossible -- meet the weirdest oddities of the animal world. In California, one family's pet lizard gains local notoriety for having two heads. In Missouri, go scuba diving with a chimpanzee. Then, travel to Florida to meet an adorable kitten with five legs, and then meet a cockatoo that raises an important question -- is a bird still a bird if it has no feathers?

Witness freak encounters, unexpected assaults, and killer animal instincts -- these are the world's weirdest sneak attacks. In South Africa, a cyclist is suddenly slammed by an antelope traveling at 30 mph. In North Carolina, a 250-lb gator wanders into a highway ditch and the relocation efforts are disastrous. Other encounters include a 24-foot-long anaconda loose in a town and a man who discovers how agonizing it can be to have a fish burrow into your urethra.

Cameras roll as unsuspecting animals are caught behaving badly. From indiscriminate mating to animals on the loose, some creatures cannot be tamed. Meet a male deer who, driven by his raging hormones, desires a lot more from a girl who approaches to take a picture with him. When a black bear's cub gets stuck in a garage, the mother desperately tries to claw her way through the door. And go on a safari where a hippo smashes into a jeep and makes the family fear that it will attack again.