Comic rhythm requires immersion and a state of being 'in the zone'. It is a form of 'flow within flow'. This rhythmic flow can be learned and tested through practice in front of a live and responsive audience. Comic communication is hard-wired in CDS where the rhythm and metricality of 'the prosodic patterns of maternal speech serve psychobiological functions central to the development of communication in the first year of life'. As the CDS engagement acts as a blueprint for understanding how comedy works, so the speech rhythms, repetitive engagement, singing and emphases in the 'melodies of maternal language' that the care-giver uses mean that in 'trans-generational communication, music may have originated as a useful mnemonic device for passing on information from generation to generation'. David Everitt again describes Phil Silvers' 'quicksilver turns from one character to another, from one idea to the next'.