The combination of cardio fitness and the martial arts has been a boon to the martial arts industry. The popularity of such programs has greatly promoted public awareness and participation. Unfortunately, despite the positive aspects of the martial arts fitness trend, it has also produced some potentially dangerous side effects. If you watch any of the infomercials for martial arts fitness systems, you will invariably see interviews with people who have successfully gotten into shape and the compulsory before-and-after photos testifying to improved health and confidence. However, you’ll sometimes also hear comments like, “Thanks to this program, I can now take care of myself in a self-defense situation.”
Now, suppose someone, particularly someone for whom English is not a native language, hears me say, "Ehh, howzit?" to a friend and decides it is the way a reasonably well-educated, upper-middle-class person greets others. After all, they heard me say it, and I make my living using words. Therefore, it must be correct.