Bob,ask anyone from Florida what a sand spur is and you'll get horror stories. There are a grass down here that have seeds that are spurred and will stick in everything.Get them in your feet and feels like you stepped on a pin cushion
. Pull them out and now they are stuck to your fingers( the secret is to lick your fingers first) they can flatten your bike tires and make a flip flop look like a porcupine
. When we were younger we would pull out a stem full a whack someone in the back and watch the unlucky sole try to turn inside-out trying to pull them out. And they are a blast when they get in your dogs feet and hair.
And thanks for the comments and yes I did turn them inside out to sew.
Roger