+1.
I am a pretty big guy, and probably look like I shouldn't be messed with. However, in 2003 I underwent 2 brain surgeries for subdural hematomas (due to a fall on the ice and resulting spinal cord injury, long story). I'm healed, but every now and then feel the odd twinge of pain in my head that makes me pretty solid in my opinion that NO one is ever going to hit me in the head. If I am confronted by an individual or group (something I of course do my damndest to avoid, as everyone should), I am not going to wait until I am being pounded on to draw my weapon. One blow from an assailant puts me in fear for my life. I will not give an attacker the benefit of my doubt. If I raise a fist, there will be something in it.