From a Wave of 8 or Facing Lines of 4, Swing Thru is done on each side
whereas Grand Swing Thru has some dancers working across and ending
on the other side of the set. EN: 60
Swing Thru is a 4-dancer call. Dancers stay within their group of 4. EN: 70
Grand Swing Thru allows dancers to work outside of their group of 4. EN: 80
Grand Left Swing Thru (or Left Grand Swing Thru)[Plus]:
From a Wave of more than 4 dancers, Facing Lines of 3 or more, or from
other applicable formations. Those who can Left Arm Turn 1/2;
those who can Right Arm Turn 1/2. Ends in a Wave of more than 4 dancers. EN: 722