[DUMBGRUNT]

Almost ever blind cord had a noose tied at the end of it

I got into bit of trouble with the cords once.
A friend of my Career Navy father, taught me the knot the Japanese used on him as a POW.

I demonstrated it on a fellow student.
He was certain he could escape.
He could not!

The bell rang and all but one of us ran for the next class.

[B4Ranch]

A friend of my Career Navy father, taught me the knot the Japanese used on him as a POW.

And the knot is?