The guards who stand watch outside Buckingham Palace are well-known for never showing any emotion. Until now.

Check out this guard who takes a tumble on a manhole cover while an audience looks on.

According to the video:

The Queen's Guard was left red-faced as he slipped on a manhole cover during the famous Changing of the Guard. He lost his footing and slid sideways, knocked his bearskin on the side of the box and dropped his rifle. The soldier quickly scrambled to his feet as his colleagues marched past as if nothing had happened.

It's bad enough this happened, but what really makes this even uglier is the fact tourists were watching. You just know cell phones galore were capturing the moment for all eternity.

Maybe the hat weighed him down. Those things are pretty big, you know.