in fact, it is

Children observe with an eye for detail that would put Sherlock Holmes to shame.
I remember when my grandson was a tiny toddler, and infatuated with hockey.
When he stood, shifting his weight from foot to foot and sang, "Oh Can-na-naa..." we knew that he was imagining himself a Canuck.
We understood the national anthem, but what was the shuffling about.
Then it dawned on us all.
Hockey players shift their weight from foot to foot in an effort to dispel pre-game nerves while waiting for the opening formalities to end. It is hard to stand still on skates.
My grandson had observed this restlessness and thought it part of the ritual of hockey, which I suppose in fact, it is.