There are certain things you just don't expect the Queen of England to do.

Engaging in a verbal joust with the Obamas is one of those things. Even if it is for a good cause.  Ahead of the Invictus Games, the Obamas sent a video message to Prince Harry, throwing down the gauntlet. Unfortunately for them, he wasn't alone. His Nan was there too and she was dismissive enough about the Obamas chances. 

No your ears did not deceive you. The Queen of England DID say 'Boom'.

Via Twitter