As promised, I have posted the videos of the man singing on the Metro to YouTube. And here you are:
Singing “Age of Aquarius”
Singing “Puff the Magic Dragon”
The images itself are somewhat unimportant, unless you like looking at my shoes. This is because I was filming in such a way so that I got the mic on the camera as close as possible to the guy to get a good sound, and I think I did that. And as a result, the lens was pointed at the floor.
So there you go. He was certainly off in his own little world as we rode through the world of the Yellow Line.