# Call of the Month: April, 1994

## Chain Reaction

by Barry Leiba

First things first: we've got a couple of quizzes from the last two months to give answers to. Two months ago, in Shape Changers, part 2, I asked what the lowest level calls are that can be shape changers from some starting formations but not from others. Well, the A2 dancers had the first shot at that, and it was a pretty tricky shot even so. MOTIVATE, from its normal starting position of parallel waves, is not a shape changer. But if it's done from two-faced lines it is a shape changer, ending in an offset formation called a parallelogram (or triple boxes, as the C1 dancers might know it). This is only marginally A2, since the two-faced line starting formation and the parallelogram ending formation isn't likely to get much success with A2 dancers. On the C1 list there are a few calls that qualify: PERCOLATE is a shape changer from waves, but is not a shape changer from back-to-back lines. TALLY HO is the opposite; it's not a shape changer from waves, but is from facing lines (and from trade by). And REGROUP from column formations is not a shape changer, but from line formations it is. I can't think of any other calls at Mainstream, Plus, or Advanced that have that characteristic. If you can, let me know, and I'll publish your answer here.

In last month's Once Is Not Enough column I posed two challenges: do SPLIT COUNTER ROTATE ¼ twice from a tidal wave, and do SCOOT BACK AND ROLL twice from parallel waves. For the first, note that the split is between the two end-to-end waves, and the first SPLIT COUNTER ROTATE is a LOCKIT, ending in parallel waves. Now reevaluate the formation(!) and do the second SPLIT COUNTER ROTATE from parallel waves (the split gives you two boxes of four). This is one case where SPLIT COUNTER ROTATE ¼ twice is not the same as SPLIT COUNTER ROTATE ½ ;. For the second challenge remember that after SCOOT BACK four dancers can roll and four cannot. So the first SCOOT BACK AND ROLL ends in a t-bone, and for the second everyone must carefully do his or her own part. We finish in a left-handed column (see the diagram -- the first time, only the girls can roll, and the second time, only the boys can).

For the rest of this month's column, we'll talk about a call that's dear to the hearts of the Advanced dancers: the A1 call CHAIN REACTION. CHAIN REACTION is perhaps the most misunderstood call on the Advanced list, and one should not underestimate its difficulty. Nearly all the time you'll see it, it will be starting in right-handed quarter tag formation (and it will end in right-handed waves—is it a shape changer?), and most dancers learn to dance it by feel from the standard starting formation. But we're going to look at the definition and the pitfalls, so that we're all able to get through it from some of the more difficult formations.

So what's the definition? (1) Those facing directly, PASS THRU while the ends of the center line COUNTER ROTATE ¼ (walk around the outside). Note that this part leaves two dancers standing still. (2) The dancers who didn't move in the first part HINGE with the dancers who met them. Note that from some formations this might be a PARTNER HINGE, rather than an arm turn. (3) The end pairs of dancers TRADE (this might be a PARTNER TRADE) while the center star turns ¼ (the star might be a facing diamond, in which case you'd do a facing DIAMOND CIRCULATE). (4) Those meeting CAST OFF ¾ while the others move up to the ends of lines. Sometimes the CAST OFF will be a PUSH CAST. The diagram shows the parts of CHAIN REACTION done from the standard starting formation.