I like the delayed flash settings for fire/glow, the extra shutter time for the trail and then the flash to freeze the performer.. Obviously that works better the more complete the blackout, and you'll get anybody else watching whinging about how flash photography and glow don't work, but if you can put up with that...
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A wise man once said: "You have two ears and one mouth, therefore you should shut the

up and listen" (though, to be fair, he might not've put it _quite_ like that..)