The British in general are famous for their stiff upper lips, but none more so than the elite soldiers in the Queen's Guard.

In fact, if you're a member of the Queen's Guard, you're not supposed to smile, speak or nod your head at all while on duty. You're just supposed to stand there stoically, no matter what. Of course, that means that quite often, a visitor will try his hardest to find a way to make these guards laugh, smile or somehow break character. It happens, but very, very rarely.

But as you can see here, an American tourist named Yankel finds a way to succeed where so many others have failed. We bet it might just give you a laugh, too.