Richard, it takes on a complete new dimension when there are 20 or 30 people all doing the "actions" simultaneously,(this is sometimes referred to as the "deaf and dumb chorale society) except for a coupla people who are a gesture behind the rest,(when asked why they replied "we are doing the harmonies"!!!)
see if you can imagine how thiis is done as "cod sign language" I have given some clues.
Eye must go and leaf you Nancy, your the girl that eye a door