We demonstrate physiks - but with faults
Well, i don't know if someone already said that, but i saw an error instantly at the loading screen. F=m*g, thats F=m*9,81m/s², how do you get "F*g=m*9,81"? Howly crap, thats wrong! I am studying that stuff - never ever do that to me again. And the cooper shells are not really a wave, because one is independent from the movement of the next. The wave needs a medium to get through, so the cooper shells have to be fixed at each other, i.e. with a rope. Also, instead of following the law 1/2*m*a²+µ*v+k*s=0, which is a "differential equation" (is that word correct? i'm no good in english, doh) it just follows the gravity. That might look the same, but there is still a difference between a sinus and a parabel, especially if you move the variable t to the unlimited. Another error is, that it just makes an instant-boom when you are braking through the sound barrier. Thats also not correct. As long as you have supersonic speed, you are dragging the sonic conus behind you, so that there will stay the supersonic "bang" as long as you fly (at least for other ppl watching you). Ok, I tried it, but complaining in english is not my best.
Good idea at all, but a little bit - wrong.