Watson and Sherlock Are flying in an air balloon. After 2 hours of flight they get disoriented and decide to land the balloon and ask some people around them. When they land a man comes up to them and says with a clear accent: ""That's a fine balloon you got there, but I can see the fuel you used isn't standard"". After a few seconds Holmes said: ""Ok, Watson, everything is clear now, we're in Soviet Russia"". ""But how, Holmes?"" asks Watson. ""Elementary, Watson, you see, this fuel was made by a very close friend of mine, and only an expert could identify it on a first glance, that man has a clear russian accent, and only in Soviet Russia scientists are digging potatoes"".