I actually do practice to shoot below the helmet and above the throat protector and can do it quickly at close range (15 yards). Some guys told me that if I had been there the guy wouldn't have stood a chance. They were surprised when I told them it would've been iffy at best. This is with a German Made SIG P228. I was mistaken when I said I missed one. It caught the edge then hit the berm behind the target.
http://www.youtube.com/watch?v=j-HH1wys70I