One of the pleasures of the Portuguese method is that of “playing” the yarn. The yarn is stretched taut from the knitter’s neck to the needle. And when the knitter’s thumb flips the yarn over the needle, if it’s done just right, a note, albeit a very low one, is heard. Flipping the taut yarn is not unlike plucking the string of an instrument. I’d forgotten about that when I was working on that twine doormat. That doesn’t happen with twine. No snap. No hum.