I saw this on Sewing with Nancy, can't wait to dust off the serger and try it. LOL
Welcome to the Quilting Board!
You've got to be kidding! That's pretty cool. I have done a simple edging on flannel for a lightweight baby blanket, using rayon crochet thread. Also rolled hems. But it always screws up the tension and then I have to spend lots of time to refix it. But this crochet is really nice.