This video is posted for informational and entertainment purposes only. Manufacturing explosive gas projectile launching implements without proper training and blessing from your master is a dangerous felony.
More thinking outside the box entertainment can be found here:
As an aside, I have a can opener that opens cans by cutting the side of the can lid, rather than the top. If one were clever, they could use normal cans from their pantry to secure any number of items they don’t want seized or stolen. The lid can be easily glued back into place – and the can placed back in the stack of foodstuffs. (You can put an awful lot of .22LR rounds into a stewed tomato can. Just saying.)