From columns or magic columns: Ends Cast Off 3/4 and Spread to become ends
of each half of the resulting tidal wave. The centers do a Zing, slightly wider
than usual to keep out of the way of the others. They then step into the space,
taking their "cold hand" with each other — the hand other than the one
they had at the start of the call.
\syhlines{b4e,g4e,b1e,g1e}
\sxhlines{b2s,b3n,g4s,g1n}
before With Finesse
after
when done from a column of 6, the ends Cast Off 3/4 and Spread as before.
The centers roll outward and back and step into the space.