Re: DANCING COALS!
LOL I have the same problem. Once they get about half the original size the coals start to jiggle toward the center of the foil. Not much of a problem actually, when inside but outside it could be a pain. Like mentioned above, methods to reduce the vibration of the hookah as a whole will probably help but just the act of drawing air through the tiny holes in the foil are going to set up a degree of vibration which will cause the coals to gravitate toward the center, which is where the foil slopes naturally from the weight of the coals. But dampening the vibrations should help somewhat.