On a scorching March afternoon , Edwin Skinner -- a 4x400 relay bronze medalist from 1964 , shouts a signal .
Four 9 - year - old girls lying parallel on their bellies leap to a crouch and take off .
On a scorching March afternoon , Edwin Skinner -- a 4x400 relay bronze medalist from 1964 , shouts a signal , and four 9 - year - old girls lying parallel on their bellies leap to a crouch and take off .