Yeah Gary, and others...blod chokes, air chokes, guillotines, etc..are dangerous and has been stated have a fine line from putting out a fire and starting a serious one. You can really hurt someone, and I agree too that 30 sec. is a long choke, hell I've seen 10 - 13 sec. average if you have your meat hooks set...Do what the guys said and go to a jiu-jutsu, shoot fight, vale tudo, grappling, catchascatchcan, etc..school and you will learn stuff that will compliment the choke because you can get out of them and the guy could come back and whip the jammy back on you and that would suck about a...let's see a 9 on a scale of 1-10.LOL