The last knife you would ever want to be stabbed with.
They add: “The compressed gas not only causes over-inflation during ascent when used underwater, but also freezes all tissues and organs surrounding the point of injection, on land or at sea. When used underwater, the injected gas carries the predator to the surface before blood is released into the water, thus giving the diver added protection by diverting other potential predators to the surface.”
Somewhat disconcertingly, the knife is not intended solely for protection from ravenous Great Whites, marauding lions and similar predators. According to the manufacturer’s Web site, it’s also ideally suited to Special Ops soldiers, S.W.A.T. teams and security personnel such as air marshals. Oh, and for the record: “WASP Injection Systems, Inc does not condone the killing of innocent creatures.”