Exactly. He is a very special person. And this must have been a special moment for him, performing in a very special place. Beautifully photographed as well. You should make nice print for him.
Just to give credit to Jaime - he is a member of the construction team who has labored long and hard to build this beautiful building. I know that made this moment even more special for him.
This image is expressive because of the scale incongruity. And when you tell us that this man is not a professional musician, but a member of the buildings janitorial staff, the incongruity becomes even greater and the image even more expressive.