Uh, Johnson, I think the word you're thinking of is "winch." Kind of changes the whole tone of the sentence. The exact reaction to the rollback depends in large part on exactly where the train is when it hangs up. Sometimes they can just push it, or use a come-along or a winch...I watched Cedar Point pull Gemini through part of the course with a long wire rope, a couple of pulleys, and a front-end loader. Sometimes the easiest solution is simply to take the train apart. When Son of Beast vallied in the first helix last season, instead of removing the up-stops from the train, they cut the track rail on one side to get the train off. (Yes, they fixed the track once they got the train clear.)
--Dave Althoff, Jr.