I spotted this Reuters photo in the Globe and Mail last week. You can just hear our Prime Minister thinking, “now is when the humans raise their hands in successive groups. I, too, shall raise my hands, to cement the illusion that I am one of them.”
I was interested to learn that the origins of the wave are hotly debated.
UPDATE: I submitted this photo to Reddit, and was amused to read this (slightly paraphrased) exchange in the comments:
Redditer A: The lack of enthusiasm on his face makes this picture.
Redditer B: That is his enthusiastic face.