The mechanism of this device is similar to a conventional water gun, but it is much more powerful jet. A Japanese inventor has created a powerful water cannon capable of causing serious harm or even kill a person. The video shows how the burst of water Cannon fired by the Impulse Mk, breaks a compact disc and a Plexiglas plate. Asp - 超強力水鉄砲作ってみた - I Made Super Powerful Water Gun That Bottle Of Gas Is Awesome. That "Water Cannon" Should Weigh A Little.