https://www.youtube.com/watch?v=jiAhiu6UqXQ&feature=player_embeddedI thought of something similar when I was a kid. Tried to make it for a science class but could not get it to work. Did not have access to anything I needed to really try. But the idea is pretty obvious.
Really curious if some one got this to work. Or its just a logical idea that can't really work.
