From a box circulate: Trailer [In-facers] walk forward as leaders [out-facers] Fold (this action is also known as Box [Split] Circulate); new trailers Extend and Hinge as new leaders do 1/2 of a Scoot Back (this action is known as Follow Thru). Thus the whole action is: Box [Split] Circulate; Follow Thru. Gives 2-faced lines.
This definition is from SCVSDA Note Service by Bill Davis.
It is provided here for informational and educational purposes only.