Steel Mill Worker Turns His Back, Nearly Gets Hit By A Flying Rope Of Hot Steel
A "cobble" happens when the rollers at a steel mill get jammed, allowing a knot of molten steel to build up until it flings a rope of hot steel into the air. It's not a huge problem, unless you aren't looking when it happens:
You can see the cobble (the big, glowing blob) on the right.
When you're not concerned about someone getting hit, cobbles are actually quite beautiful:
[Via Reddit]