This is a video captured in a Polish steel factory, but I would totally believe you if you said they made lightsabres or T-1000s there, because that bright neon glow doesn't look like it's real. Or from this world.
How come the steel 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 up to twist around. The workers hardly cared! [The Awesomer]