I hear pilots talk tough all the time. It's a guy thing I guess. Guys think they are born knowing how to fight and whoop up on other guys but in reality untrained fighters wind looking just like this when they do go to blows.

‪Funny Gay fight‬‏ - YouTube

If you are serious about wanting to know how to defend yourself with your hands go take some Krav Maga or Brazilian Jiujitsu. You'll soon realize that you weren't nearly as ninja/Norris as you thought you were, even if you've been taking traditional martial arts for years.