This is a video captured in a Polish steel factory but I would totally believe you if you said they made light sabers or T-1000s there because that bright neon glow doesn't look like it's real. Or from this world.
How come it started dancing like that? From here, it looks like the ridiculously bright molten steel was running through the machines and got caught, causing it to back up, brighten up, and pop and twist around. The workers hardly cared! [The Awesomer]