[hutzlibu]

"(it's super cool seeing someone do a gun disarm with a cloth/scarf). "

Don't try that in real life, though. And definitely not against a person who know what he's doing. Unless you really have no choice and are about to be beheaded by Taliban or alike.

And to the technics from the Book, well, from first glance they seem to work. But the description seems very static. "when the enemy does this, you do this - and then this and then this".

Well, doing so is a good practice to get a feel for what is possible - but never try to do that exactly in a real combat. Because a real situation is always more complex. Nobody is ever moving like in a book. There are variations. In speed, in position and in a fraction of a second the enemy knive can move another way. There are obstacles around you (that can also be weapons to throw or just distract). There are often other people around who complicate or ease things. There is the sun that can blind the oponent, or you, etc. etc.