If you’ve never left North America, you may never have experienced a ride on a double decker bus like this one in London.

There is a mystery about them that no one has ever solved.

This bobby at the Charing Cross station is still trying to figure it out. He scratches his head and says, “I just can’t figure out who’s driving the top bus.”

By the way, did you know that the term “bobby” for a policeman originated from Sir Robert (Bobby) Peel,  the man who founded the British Metropolitan Police (also known as Scotland Yard) in 1829? Sometimes the bobbies were also called peelers (for his last name), but that can’t be a good thing, as some may associate that term with strippers.