In 1952, the driver of a London double decker bus on route 78 had to make a split second decision when a span of Tower Bridge began to lift in front of him. He accelerated his bus to clear the by then 1 metre gap and the bus then dropped 2 metres onto the other span which had not yet began to lift. No one was seriously injured and the driver was not at fault.
Pretty amazing and here is little piece of artwork by someone unknown. Cute, hey