This is a simple messaging system useful for barbecues in large gardens or anyone in line of sight.
Simple messages like hello, come here, and look at me I'm cooking can be signalled with a single spatula but the fully subtlety of the system comes into play with possession of two spatulas and a boyscout handbook. Amaze your friends by having your every wish carried out with a mere wave of the hands(holding spatulae).
Always remember - do not overdo the demands as only a single spatula is needed to signal - shove this right up your arse.