So, riding the T two nights ago, I became aware of raised voices to my left. Not angrily raised, but just...differently modulated than is usual for rapid transit. Turned out to be two guys-- as I looked over one of them jumped up from his seat to make his point more expansively. These two guys had, as far as I could tell, met on the T thirty seconds before, and before thirty more seconds had passed a third guy had joined the discussion. It was intense. Again, not angry, although my first reaction was "scary, don't lose your temper, calm down," and once I realized it was a friendly debate my second reaction was "rrr...just be quiet and sit down." But my third reaction, which I shared with another woman via grins and obvious spectatorship, was "this is great."
The debate was on the topic of Alewife station, and what happens at the end of the red line. Guy A took the position that the trains come into the station, then simply reverse direction and go back out, with their back end becoming their front end. Guy B thought that this was absolutely ABSURD, and that the trains turn around in a circle somehow. Guy C brought in a voice of moderation and claimed that there was an extra "secret track" (his words) where some trains branched off and maybe somehow turned, but maybe not. It was unclear to me.
Anyway, these guys decided to ride to the end of the red line, to go to Alewife right then, and SEE. Beer was mentioned. I'm not sure if Guy C was in on the wager, or if any of them actually did it. I got off at central. But it was a really excellent moment in my day, and made me love Boston, and cities in general, and public transportation. And guys.