A guy is excited about something. He punches the air out in front of him while crouching. Imagine doing a jab from like TaeBo or Turbo Jam and you twist your hips a bit and crouch one leg in front of the other and jab the air. This character does it about 4 times in a row while saying 'yeah yeah yeah yeah yeah' fast. I thought it was off of scary movie 4 (http://www.youtube.com/watch?v=3WIj7AqDp1c at about 0:50) but I think its off of something else too. Its bugging me!! so if anyone can help me Id greatly appreciate it! 
thanks so much!
thanks so much!