What use would you find for a knife that injects compressed gas into its victim, causing rapid expansion, to explosive effect?
Meet the WASP Diving Knife:
You may have heard of it as various police forces around the world issuing warnings about the weapon making it onto the street. So what's it good for? The manufacturers of the "WASP Injection System" claim, "it is perfect for diving and military use, and it will take down some of the world's largest predators such as bears and sharks".
The site goes onto state:
"As divers, we all know what the effects of compressed gas are underwater. Our training teaches us that our lungs would burst from over-inflation if we held our breath and rose to the surface. This principle is key to the effectiveness of the WASP Injection System."
For anybody experienced at diving or with sharks, this idea may seem laughable. While the creators of the WASP Injection System claim to know about diving, if you research shark attacks, you will see that in almost all cases:
- The shark was never seem coming
- The victim was attacked with such force, they describe it as "being hit by a bus/train"
- Attacks are normally one bite affairs, not prolonged assaults
Also, looking at statistics of shark attacks by depth, it is clear that most shark attacks actually happen on the surface, to swimmers and snorkelers, not divers. Speculating on this, it is commonly agreed this is because the siloulette of a surface swimmer, is much more easily mistaken as the natural prey for a shark. Unprovoked, submerged attacks are incredibly rare - as a rule of thumb, if you can see the shark, the odds are it saw you ten minutes ago and has already made the decision you're not worth attacking.
How does the WASP Diving Knife Actually Work?
The WASP Knife is fueled by compressed gas cylinders. After the unlucky victim has been stabbed, a small button opens a release, allowing the compressed gas to force itself out of the tube, running down the centre of the blade and into the hapless animal/person. The effect is almost instant, delivering freezing gas (about the volume of a basketball) at a terrifying 800psi. If you were unfortunate enough to be underwater at the time, the extra gas would cause you to be positively buoyant and of course, the gas would expand as you rise, adding to your woes.
Video Demonstration of the WASP Injection System
Is it any use to be as a diver?
This reviewer would have to give a definite "no". Unless you're a member of the Elite SBS or fancy strapping various weaponry to your leg like James Bond, it is highly unlikely you'll ever find the need to inject something full of freezing gas while diving. In fact, I would say it's more likely that you'll have an accident and hurt yourself with the WASP Diving Knife, rather than it saving you any pain.