Single File

This was originally a generalization of the "put the belle in front" action at the start of calls like Ladies Chain, Dixie Style, Dixie Chain, and Flutter Wheel. It skips that first action. The call finishes normally.

\pvfour{b2s,g2s,g1n,b1n}	\phBB{g2s,b2n,b1s,g1n}

before Single File Flutter Wheel	after

It has been extended to apply to any 2x2 call in which some people cross the center line of the 2x2 before the others. It is done from a 1x4, and the role of the person who crosses the center line first (in the 2x2) is played by the person already in the center.

It was applied to calls done in a single file column, in which people cross the center in a forward direction:

\pvfour{b2s,g2s,g1n,b1n}	\phBB{b2n,g2s,g1n,b1s}

before Single File Cross and Turn	after

or a backward direction:

\pvfour{b2n,g2n,g1s,b1s}	\phBB{g1e,b1e,b2w,g2w}

before Single File Shakedown	after

It was then extended to "lateral" calls like Reach Out, and done from a 2-faced line. (On a Reach Out, the leads cross onto the other lateral side; the trailers do not.) Many people consider this sort of thing excessive, and such usage is extremely rare.