A reader shot this one over.
To operate the assembly, the operator places the inlet tube with its valve open adjacent his anal region from which a colonic gas is discharged. The piston is then withdrawn to a degree producing a negative pressure to inhale the gas into the combustion chamber to intermix with the air therein to create a combustible mixture. The ignitor is then activated to explode the mixture in the chamber and fire the missile into space.
Into space? You mean like into orbit around Uranus?
His "anal region from which a colonic gas is discharged"? Is there another region from which colonic gas is discharged?
This is definitely one invention you don't want the inventor to demonstrate for you.