He’s holding his hands in such a way that the “frame” is tall and narrow; whenever I’ve seen another director do this, their hands are 90 degrees rotated.
I like it. It looks like an arty-farty version of “I’M CRUSHING YOUR HEAD!!!”
The rotation is part of the joke because Ebert knows full well the correct way to do it.
Moderator speaketh: I have edited the thread title, so that people reading along have some sort of clue as to what it’s about.
Vague thread titles are a damn nuisance.