Looks like the teacher wearing a hat like this
Oh good God. Slap-face emoticon here.
Watch the thing roll. You can clearly see his bald white head, the black mask, the grayed beard beneath, and how chunky he is. Also he has a black turtle-neck or something there over his neck.
Even your capture clearly looks like a big round white head with the damned ubiquitous-now mask of black color.
And no, his arms do not look “black”.