Found again.

 The Seedpod of Yellow Wood Sorrell described in my previous post is about an inch long.  Too green and wet to explode on contact, I thought I'd do a minor dissection, with my fingernails, to show the seeds.  Lined up like "peas in a pod," they get thrown up to at least 10 feet away from the parent plant when the dried pods are touched.  I can imagine these explosions knocking certain insects off their feet, and maybe sometimes shooting down a hovering fly or bee.  It's the Sorrell's form of propaganda.which is the dissemination of information.  In this case, instead of church doctrine it's DNA.  More trustworthy.

Be sure to click on the lower photo for a closer view.