While nearing the end of a long and slow service from Rockwood to Cumberland I got bored and started playing with the keyboard, having fulfilled all the objectives save the final one.
Suddenly I was not an engineer in the driving seat anymore but rather a passenger trapped on a ghost train.
Pressing the arrows, numbers and + and - keys made my avatar move along the train, being able to run in the upper deck of the auto cars, hanging off the ladders in switchman mode a few keypresses later.
Key 1 brought me back into the cab, but I was unable to move any controls, nor take a seat, nor jump off, I was truely trapped this time.
The ghost train sped up more and more, broke the event horizon and drove me off into the great white void that lies beyond, first trashing through a forest of tree without any tracks for guidance.
Then suddenly when I thought all was over, I was back on foot near the south end of Cumberland yard but unable to move.
Was that an out of body experience or a hallucination? Or did I accidentally discover a function that has not been made public yet?