Under certain circumstances, people who collide in the same spot during a call will take right hands with each other, according to well-known rules governing this type of occurrence. Other than that, the program does not allow "impossible" intermediate situations in which multiple people occupy the same spot.
In some cases, you may want to call something that sends people through a momentary impossible situation, for example calling something like `everyone do your part, split trade circulate twice' when people are in normal waves. The first `split trade circulate' is impossible, but if you tell the dancers to do their own part and not worry about the collision after the first one, they can do it.
The program doesn't like to do this. Just calling twice split trade
circulate won't work, because the program will have multiple dancers on
the same spot after the first one. You can trick the program into doing
it anyway, by using the <ANYONE> do your part concept. Enter something
like heads do your part, twice split trade circulate while the
others twice split trade circulate. Exactly who has to be designated
depends on the the setup.
You can also use this method to get everyone to do their part of
calls that are illegal in the existing setup. For example, flip back
is illegal from facing lines. If you really want people to do it anyway,
with everyone doing their part, you can enter beaus do your part,
flip back while the others flip back.
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