One afternoon recently I got the Subway into town. I bought my ticket at Govan then proceeded down the escalator just as an Outer Circle train pulled in. What made this unusual was that there was rain on the window despite the Subway being entirely underground. The Subway was one of the very few modes of transport that ran during the epic snow at the start of March for that reason though even then it finished early. Then I remembered that across the road from Govan is the depot and this train will have just entered service for the evening peak. It was good, though, to imagine the train leaving its eternal loop to take a secret route into daylight or going through a cave and a waterfall like in Tomb Raider or something.