What really caught my eye was the Concussion Cannon, which blasts compressed air through a small hole to achive a loud sound and shockwave that reverbrates through the entire body.
It appears to be just a chamber attacked to a sprinkler valve attached to a reducer. However, the fittings are metal even though the cannon is operated at only 60 psi. Could I use PVC instead? That sould be cheaper and easier, and I see no reason why metal is needed. Check it out, and maybe use it yourself!
