[williamscales]

I believe this knot is similar, but not quite the same: https://www.animatedknots.com/uni-knot.

The site also has the noose knot which can be extended to create a hangman's knot: https://www.animatedknots.com/noose-knot

There is some discussion on the noose knot page that indicates the hangman's knot is deliberately not included in the encyclopedia. The site doesn't give a reason for not including it.

I agree it should be included in an encyclopedia of knots. Any knot can be dangerous if you put it around your neck.