Show comin coming events cast their shadows before them under certain conditions an approaching pro aching sound cah create a visible eff effect act says colliers A short time ago in england for example a man standing on a hill suddenly noticed a long narrow shadow rushing toward him across the valley and as it passed he felt a violent shock and heard a loud report A powder magazine several miles away had exploded and the concussion had produced a compression wave of such density that its shadow was cast by the sunlight |