A single expression is plenty when it's this one. To be fair, it's possible there is evidence of a second expression here, though I think it's just him opening his mouth slightly in order to breathe. His tongue comes into play at one point, so it's debatable. Perhaps the Supreme Court will have to decide the count.
Oh, wow - I just noticed that hat! Pardon me. I was distracted. As are most people who spend any time around him.