A number of years ago I set my camcorder up at Binney Jct California to catch some trains on the SP. While I was waiting a eastbound UP “train” stopped short of the crossing. I didn’ pay much attention to it, which was unfortunate. When it crossed the diamond I realized it was a movement of at least 30 locos and I was out of position so I didn’t get it on tape. [:(]
Hospital train is a string of bad-order but otherwise OK for movement cars or locomotives being transferred to a shop for repair or disposition. The term is based on the term “cripple” for bad-order equipment.
Could also be a power repositioning move. Happens all the time on CSX over this way. Heavy trains going in and light trains out tends to bunch the power at one end of the RR so they have light power moves or put extra units on trains running in one direction with those units isolated to keep fuel consumption down.