Bus stop - opps!

In Rome, Delaney was curious about why people kept pushing the red buttons after each bus stop.  I explained that it was to make sure the driver stopped.  If no one wanted to get off on a stop, he would drive right on by.  In Lublin they stop at every stop without having to push a button.  However, the other day David and Delaney stepped up to the door to get off, the bus stopped and the other two doors opened but not the back one where they were standing.  David tried to get the driver's attention and failed.  They ended up riding to the next stop and walking back...good thing it was a nice day : )