Last week, I was sitting there when someone boarded the carriage, spent ages checking the map, looking confused, all the time the train was sitting in the station, this went on for maybe five minutes, and they waited until the very moment that the doors shut, locking them inside, and then plucked up the courage to ask 'where does this train go?' Needless to say it didn't go to where they wanted. (p.s. I'll always assist someone if they ask, and I knew they were lost, but I know from personal experience that if you volunteer assistance you get treated as a nutcase).
Once I was on a train which stopped sharply between stations. A serious looking woman turned to her colleague and said, in all seriousness, 'We just hit the buffers'