With an innocent little splash, the defenseless amphibian belly-flops into the drink. Powerful legs kick and recoil, scooting the frog forward. The critter pauses, re-surfaces, bulging eyes betraying looming danger. Webbed feet dangle invitingly, soft white belly tantalizing, almost taunting. In one explosive instant, the water beneath the creature drops like an elevator; an .unseen predator opens its jaws with the vacuum force of a plunging five-gallon bucket. With a watery whoosh and a steel-door snap, poor little critter meets his maker.