Okay, here's better directions. When he faces left, you press left on the D- Pad, when he faces right, press right on the D- Pad, when he raises his hand in the air or something, press up. And last but not least, press down when he bends down.
Be sure to do it when everyone starts doing it. At least this is something I remembered (finally) after a few years of not playing the game. Remember, he does it, then the other sims do it.
I'm now in love with the little "despicable" Minions from Despicable Me. I saw the second film a few weeks ago and loved it and now I adore the Minions as well. They're too cute! Who doesn't love Minions? And I might not have a new sig and avy up for a while since I'm saving Images to my 3DS Camera. Look on Examiner.com to read what they're saying in the first film's credits.