From parallel waves: Those facing in do a "half cross circulate" and arm turn 3/4 with then adjacent arms. Those facing out do as in Follow Your Neighbor--i.e., flip into vacated adjacent spot and roll. Finishes in parallel two-faced lines.
Gus Greene 1969
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.