Buckingham Palace guards are paid to take themselves too seriously. They signed up for a job that doesn’t allow them to feel feelings or make any excess movements. I think they even have to shit standing up. So when a brisk wind rolls in knocking this guy on his ass, he might as well have spit in the Queen’s face. And then to get up and smile about it?? 100% chance this dude is updating his resume as we speak, if he already hasn’t been executed by now.