On the slide thing: this is really my subject 'cause I've seen this done. A guy comes up to you with a semi-auto. If you can jack the slide back and twist it up and sideways, it's possible to tear the slide right off the gun. I don't know if this keeps the gun from firing, but it seemed to surprise the guy with the gun and the guy who now had the slide palmed it and broke the guys nose. THIS WAS NOT A MOVIE. I was walking around in downtown Chicago with my Aunt and I happened to glance down an alleyway. I kinda paused when I saw the gun, which I shouldn't have done, and actually saw the guy do this, clearly, from 10 feet away.