Americans really are afraid of roundabouts! We do not know how to use them! And don't even get us started on scones … If you've ever visited the United Kingdom , or if you live there, you'll probably relate to this random assortment of fails and memes. I have recently [today, as I wrote this] become a fan of the cat who lives at Downing Street, working as the Chief Mouser. Americans should immediately adopt this tradition and get a cat to work in all levels of politics. I think that would solve…