"The Tinsel Fairy" ha ha! I had a visit as well, but it was not boolit casting that lead to it (no pun intended). When I was pouring a lead and oakum cast iron soil pipe joint, I did not realize that water had risen inside the bottom pipe while I was waiting for the pot to heat. I won't forget the "pop" it made, nor the sight of lead burning holes in paper-backed insulation all over the walls and ceiling. Luckily I was dressed in heavy Carhardt bibs and had glasses and gloves. Did not get burned!
Be careful melting range lead because of pockets in deformed bullets containing water droplets, as mentioned above.