From Tandem Couples, a Mini-Wave Box or the 2 x 2 T-Bone obtained from a Mini-Wave Box after Leaders 1/4 Out.

There are two slightly different definitions of Boomerang depending upon the starting formation.

  1. From Tandem Couples: Leaders Zoom as Trailers Circulate and Trade. Ends in Facing Couples.
  2. From a Mini-Wave Box or other applicable 2 x 2 formations: Leaders Zoom as Trailers Scoot Back (Extend, Trade, and Extend). A Mini-Wave Box ends in a Mini-Wave Box. This use of Boomerang can be fractionalized into halves.