No question we are heading to that seventies show, with trump and the housing price overhang. But let's have fun.
I got this for the cottage where I have drains that regularly clog. I went to half force and it sounded like a gun shot that got everybody screaming. It is an air gun for drains.
Now, I've used a lot of air guns in the old geophysics business. We got excellent images in Lake Ontario that showed how high the seismic hazard is here. All forgotten now. The air gun compresses air and blows it with a high-speed valve. It is an explosion.
Also, this would produce a neat air vortex for science class. Probably can blow out a candle at 50 feet. Get it before it is banned by lefties.
ps -- world's simplest potato cannon.