Back when I operated Runaway Train at Chessington I used to have a regular recurring dream that I was operating and couldn't get the train to park in the correct part of the station to open the restraints. So the train just went round and round relentlessly for hours. Even to this day, I have this dream once or twice a month.
A pretty good dream I had once was that Southends Adventure Island got a B&M Floorless but it fell apart and into the sea.
Most of my dreams these days tend to revolve around getting on Disney Cruise ships.