Typically from diamonds: the ends do their part of an In Roll Circulate, Here
Comes the Judge, or whatever. The centers slide over in the appropriate direction
without turning, and then Hinge.
\syhdiamonds{g2n,b2e,g3s,b3w}
\syhlines{b3n,b2s,g3n,g4s}
before Zoom Roll to a Wave
after
It would be much easier to avoid confusing these calls with the preceding ones if they
were only used in the obvious formation. However, it is legal to call In Roll to a
Wave from waves. The result is C1 phantoms.