If you ever see a cop coming at you with this crazy backpack on, you probably want to get the hell away from him. Because it's packed full of pepper spray, and it's ready to fire at you indiscriminately.
Yes, the aptly named Crowd Buster can dispense with the burnwater with either pellet fire or fine mist modes, the latter of which I hope nobody uses on a windy day. Also: the spray in there contains a dye that sticks for up to three weeks, allowing the cops to easily identify anyone it hit. It requires two people to use, with one holding the pack and the other controlling the gun. I am really, really hoping no mean-spirited pranksters get their hands on one.