Pouring Molten Copper On Ice Exploding Ice

Im Pouring molten scrap copper on ice. In this video i don’t know why but it caused an explosion. im not sure what went wrong. when i was pouring the copper on the ice it was weird because it wasn’t even making any sound. The explosion sent molten copper flying everywhere even burned my right hand my shoulder and my foot and to top it off it even caused a fire on a wood pile like 40 feet away. when the camera falls you can hear ice and copper falling from the sky at 0:14 seconds in my video. and on 0:19