It appears that a door fell completely off of Monorail Green this morning (sometime before 10am) while at the Grand Floridian Resort and Spa station. The door is seen in the photo above dangling between the Express and Resort Line tracks, with personnel taking a cherry-picker up to the door to pull it down. Obviously, this has caused several hours of downtime for the system and guests are being directed to alternative transportation.
It is unknown if guests were in the monorail car when this happened, but it appears that no one was injured. Disney has yet to make any statement on the incident.