minding your own business, when suddenly, a huge, fast moving man comes at you running at full steam, frothing at the mouth yelling "I'm going to kill you!" You have no time to run, no time to hide, no time to pull out a gun, no time to do anything except react FAST or get slammed into by this seemingly insane or drug crazy behemoth baring down on you fast! What do you do? Do you side step him, perhaps trip him, use his force against him, let physics or gravity do the rest and watch him slam into the ground and than go the opposite direction of him FAST. Or do you hit him with some nifty blow into just the right nerve cluster and watch him collapse to your immense relief. Do you grab him and pull him down and put him in some BJJ hold that not even the Gracies could break out of. Or do you do something else. All opinions appreciated.