The WASP knife is fairly simple in principle ... not only is there the instant shock and freezing effect, but the large injection of air causes the recipient to float upwards, and as it rises ...

Add this to my “Things to hyperventilate over” list: British police are on the lookout for something called a WASP Knife ... surrounding the point of injection on land or at sea.” ...

"This knife will almost certainly kill and the ... Aston and Lozells." The Wasp injection website states: "The effects of the compressed gas not only cause overinflation during ascent when used ...