Taking No Country for Old Men too literally
A patent has been filed by inventor Gregory Rondinone of Connecticut for a knife that will shoot a jet of compressed air into whatever it punctures at the press of a trigger. The concentrated burst would be powerful enough to rupture soft tissue in organs, not to mention pump a ton of air (or some other gas) deep into places it shouldn’t be. It’s been suggested that the knife has valuable applications for underwater use, such as a diver staving off a large animal, both injuring the offending creature and rendering it unnaturally buoyant so that it floats away.
Post from: gadgettastic.com