grabbing the larynx (sp?) is not that hard in a grapple. took a guy down once when i was a bouncer after he poked me in the chest for the third time as I was trying to get him to leave the bar...had him pinned to the ground with my thumb buried palm deep next to his adam's apple. unfortunately, that left me open for his buddy to try and drop kick me in the ribs. luckily, one of my co-workers had an awesome check kick and I didn't get my ribs stove in.