Looks like it's just a myth that the Queen's guardsmen are cool and unshakeable.
An Oxford student goofing for his friend got the surprise of his life when one of the Queen's guards attacked him for mocking his march.
What visitor to London hasn't mocked or made faces at the Queen's guards?
You're told they won't even acknowledge your presence unless there's a clear and present danger to the royals and shiz.
A friend shooting video of the jokester student told the UK's Sun,”I just thought “Oh My God” he’s got a gun and he’s going for Nick and he grabbed him and tried to boot him and we were so shocked we just ran away fast. You often see people pulling faces at the guards and standing beside them for photo’s and marching along with them but obviously this soldier didn’t find it funny. In hindsight I can understand the soldier losing his cool but it was very frightening indeed."