From waves or 2-faced lines: Ends do their part of a Swing and Slip.
Centers Scoot Back and Spread.
\syhlines{b2n,g2s,g3n,b3s}
\syhlines{g3s,b3s,b2n,g2n}
before Wipe Out
after
But beware: The above is sort of a cheat. The ends' initial part is
actually a phantom run, not a "do your part, swing", and that part
is therefore not subject to Generous, Stingy, or Yoyo. These
concepts, applied to the ends, will act on the second part only. They
may not be applied to the centers.