Brodys' revenge.

We probably all remember how the Intrepid Police chief finally got rid of that pesky great white shark in Jaws. Now a company has taken that rather 'explosive' idea a little further. The 'WASP Injector Knife' contains  a CO2 canister in the handle which, when a small button on the hilt is triggered, injects a blast of 850psi gas through a channel in the knife's blade, inflating the target with a painful and debilitating pocket of gaseous pain. According to rumours and speculation, this nasty little thing will sell for about $400 and be made available to the general public. To be honest, I really wouldn't like to get within knife range of a shark just to find you've forgotten to put in that little cannister of instant death. It would probably be a damn messy thing to clear up afterwards as well.