I had just loaded my allready hot pot with sprues and floor sweepings, turned away to place my mould on a stove to keep warm when POW!,my right ear rang a minute after I pulled my fingernails out of the ceiling and my heart stopped racing.I thought for a minute what it could have been and figured it must have been a stray primer that was swept up with the lead splashes and dribbles from the floor. I fluxed and cleaned the pot and sure enough,a prmer with no dent floated to the top of the melt. I have to thank Jesus it didn't get under the molten lead and spray me as I was only about 3 feet away from it when it popped. A reminder to myself I can't be to careful.