Today's Knot: The Sliding Sheet Bend

I am fascinated by this knot that I learned today.

It's called the Sliding Sheet Bend, and it's interesting because you can "slide" the knot up and down its length in order to do adjustments without weakening its strength, but the knot can also be completely and easily untied with a single pull of one end. One use that was given as an example is that it can be tied to secure the limbs of someone placed onto a BDSM Cross.

Here I easily untie an SSB knot with a single pull at its short end:

http://www.youtube.com/watch?v=ftXbH4s19eE

Here is a youtube video from TKB showing how to make such a  knot.

http://www.youtube.com/watch?v=9WSS5JEPp3g