I'll share a molten metal accident one of the security guards at work told me.
When she worked security at a steel mill, the roof of the smelting area was extremely shitty and full of holes. It made working with the molten steel interesting to say the least.
So when she was making her rounds this new guy, practically a teenager was doing that pouring cast thing. It was raining very hard at the time. Well, a piece of that roof gave and a bunch of water fell onto the kid...