Last month in Leipzig, Germany, the world's most enormous drill bit emerged from this wall. It was boring a subway tunnel. Want to see the drill up close?

Here's a close-up of the massive drill head. This is one of those moments when it is perfectly appropriate to exclaim: "DUDE!" You may also slap your head, or the head of the person next to you.

Photos by Sebastian Willnow/AFP/Getty Images.