Most people I know and encounter have this grand sense of confidence about self defense. I know an old man who gets winded getting out of his chair, but thinks he could win a fight against young, athletic men without being hurt. I've met people who have never been in a physical confrontation, but are sure they could "handle themselves" if the need arises. In fact, that was my attitude when I was younger, especially when I started martial arts. Why do people think this way? I am not well traveled, is this an American thing, or people in general? Can you really know your own capabilities without the occasional brawl?