Starting formations - depends on the "Anything" call
Do the anything call leaving off the final Extend, then do a full Chain Reaction. The anything call is
usually a Scoot Back variation of a Tagging call. For example, Flip Reaction: From Parallel Waves. Flip
Back Centers To A Wave then all Chain Reaction. Tag Reaction: From Parallel Lines. Tag Back To A
Wave Centers To A Wave then all Chain Reaction. Note: For Tagging calls, there is an unspoken 'Back'
(Scoot Back) in them (e.g., Tag Reaction means Tag Back Reaction).