I was waiting for the L in the loop when a strange old-timey two-car train clattered by. It didn’t stop. It just rumbled through the station.

The Guy Standing Next To Me: What the hell is that?

I managed to snap a photo before it got away, although I nearly dropped my camera on the tracks in the process. I expected to see Doc Brown, Clara, Jules and Verne waving from a window. (And Einstein. Can’t forget Einstein!) Anyone know what the deal is with those old trains? Here’s a better look: