It's late. You're on the last train home from the city. You need something, anything, to keep you awake. How about a sing-along?
On one late-night train leaving London, a traveler was not content to quietly sit in his seat on the train. The pints from pub put him in a jolly mood, so he decided to impart his good mood on the rest of the carriage. The unnamed gentleman started the most quintessentially British sing-along that has ever happened in a train car. And it seems like the whole car joined in with the song.
Every transit agency should employ such a friendly bloke to keep its late-night travelers awake.