When you pose for a picture you hold out both arms and tilt your head upward. The eagle spread pose indicates to others that you are an eagle and they are small birds which you can eat. It is a pose of dominance. This pose was invented by comedian Dex Carrington and featured heavily in the series "Dexpedition" on MTV Europe. The pose later gained international appeal when it was featured throughout the Snowboard World Championships in Norway 2012.
In a club you stand on a speaker and do an eagle spread pose to assert your dominance and awesomeness. (someone takes a picture of you doing the eagle spread pose in that club)