A carbide cannon is pretty much a noise maker.It is a self made cannon that only produces a loud noise. The shock wave will produce movement from the sound vibrations. That is about all you can expect. I would warn my closest neighbors that you are experimenting. Apologize in advance for disturbing them. Herr is the link for detailed plans and a funny story
. http://www.hevanet.com/stuartp/WebPages/CarbideCannonSuccessStory.htm