This knife, called the Wasp Injector Knife, is outfitted with a gas canister in the handle that "injects a freezing cold ball of compressed gas, approximately the size of a basketball, at 800psi nearly instantly" upon stabbing. I'm going to go ahead and use my once per day quota of the usage of the word "aggressive" now. Back up, I'm using it NOW.
This. knife. is. AGGRESSIVE. No doubt about it.
And it will totally be handy if you ever find yourself in a hand-to-hand combat against Osama bin Laden, Chuck Norris, or a T-Rex. Or against a WATERMELON OF ILL WILL!
[youtube=http://www.youtube.com/watch?v=Sa_NC-_fvKs] [Via]