[Phantasm]

Jump the Shark - Jump was just a regular mako shark in an aquarium before she ate some bad chum tossed in by the regular chum bucket. Then her intelligence skyrocketed to genius levels and she gained the power to take on a were-shark form and exist out of water for a short time. But when she smells blood in the water, she reverts to her savage instincts.

I picture her as a Hulk type antihero character, one that just wants to be left alone but forces outside her control won't give her any peace.