that and let's not forget about the ability to tap to, if the guy (or girl) is trying to hold them selves up with their arms (meaning they can't tap something) and they can't say "tap!" cause they are choking it's not cool just to let them go to sleep. i am sorry to say i nearly hurt someone bad the other day in a similar circumstance. i had him mounted...his right arm was in a kimura lock and his left arm was trapped under my body (though i didn't really notice at the time)...over his mouth...if i didn't interprate a barely audible, muffled noice as a cry for submission i can only imagine would woulda happened to his shoulder.