From a Generalized 1/4 Tag in which the Very Centers are directly facing an outside dancer.
Ends in Parallel Lines. This is a 3-part call.
Cross Nuclear Reaction [C3B] : Same as Nuclear Reaction except that the Very Centers Diagonal Pass Thru with the diagonally-facing outside dancers.
Those doing the Pass Thru (or Diagonal Pass Thru) should point at each other before moving as in Chain Reaction.
anything (Cross) Nuclear Reaction [C3B]: Do the anything call leaving off the final Extend, then do a full (Cross) Nuclear Reaction. The anything call is usually a Scoot Back variation of a Tagging call.
See also anything Reaction [C3A].