I'm in southern Ontario, Canada; hoping someone is familiar with this
plant (weed?) that has a "throwing" mechanism:

About 6 inches tall, is growing in patches in dry sunny areas, has pale
green, sparse needle-like leaves less than 1" long on upright stalks...
I noticed for the first time today its interesting ability to hurl many
small projectiles when the plant is lightly touched or walked on. It
throws them a couple feet up and out. They must be seeds of some kind,
but on examination appear as tiny green coils or springs, 2-3 mm in
size... does this ring a bell with anyone?

Thanks,
Rebecca
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