You need 12 people (5 fliers and 7 bases).  You may need extra spotters.

Start with and elevator extension in the middle, shoulder stands in front facing each other, and shoulder sits in front of the shoulder stands facing each other as well.  All fliers connect arms with the top person always on top with her palms facing down.  Remember this is just and effect and should not be used for balancing.  Now have the shoulder stands and shoulder sits walk backwards.  Keep it slow that it remains in line.  Smile for the finish.

NOTE:  You may add or subtract people to this pyramid according to the amount of people you have.  You may also make this a novice pyramid if you keep the elevator down and have shoulder sits with people just standing on the outside.