The State owned parking ramp that I use, has automated entry and exit doors.  You flash you ID badge at the reader and the entry door opens.  Likewise, when you approach the exit, sensors detect your car and open the door.  And while there are three exits, only two of them are commonly known.  The third is through the loading dock, but most people are not aware of this exit.

Unfortunately, the two main exits doors quit working at the same time one day.  And, the drivers that were not aware of the third exit, found themselves driving in circles trying to get out of the ramp.

So, it was like the song says “you can checkout any time you want but you can never leave.”