Related:

• A one track mind often has a derailed train of thought.
• Mindy: Homer...you don't have to do anything you don't want to.
  Homer: Well, maybe I want to...but then I think about Marge and the kids....
• I came down from Jacksonville on a train that was the slowest train I'd ever been on.
  I said to the conductor, "Can't you run any faster?...
• I'm losing my thought of train....
• My train of thought is a Mag-Lev.
• Never feel remorse for what you have thought about your wife.
  She has thought much worse things about you. -- Jean Rostand...
• Train of thought derailed / still boarding at the station.
• Train of Thought-Now boarding - Last stop; Gutter.
• Your train of thought makes all the stops.