So the switch for what ever reason did not change and the monorail then backed up on the same line. There are two switches involved though; one to go from the Epcot line to the spur and a second to go from the spur to the Express line. Did the other switch go? If he completely failed to notice that he did not switch tracks what would have happened if he did get on to the spur but the second switch failed to work. Instead of two destroyed monorail cars and the loss of the purple CM we would be looking at a fully destroyed monorail on the ground and probably the death of the pink CM. It seems like something really has to change to prevent this kind of mistake in the future. I have to wonder if this is the first time a monorail has backed on the same line or is it a repeated occurrence but the first time the monorail was not stopped in time.