From Back-to-Back Lines.
The n dancers on the right-hand side of each Line do a 'Shakedown' movement (1/4 Right, Counter Rotate 1/4, and Roll) and adjust to end in Concentric Facing Lines of n as the others 1/4 Right and Step Ahead to join hands creating a compact symmetric formation.
© Vic Ceder. All Rights Reserved. Used with permission.