Railroad thermite welding

There are just no words.

I mean, really, this video has no words what so ever.

What it does have is...at 0:15 a thermite mixture placed on a heated form...at 0:23 an ignitor lit and placed in the mixture...at 0:28 a controlled hell breaking loose, peaking at about 0:35...molten iron leaking into the form at 0:45 (I think)...an awesome sound at 0:48...or maybe molten iron leaking at 0:50...I have no idea what the yellow thing does at 2:05...still glowing iron being cleaned up at 2:45...and big grinding at 3:30.

And that's what thermite is used for.