I just read about it and it appears I've been doing it. My confidence as a teenager was non-existant, so I always assumed the worst. People hated me, I was the most boring person on the planet, etc. Luckily, I met some people when I was 16 who drilled it into me that I had to stop doing that.
I started on 05/30/10 at 253. After almost 4 years and many, many breaks, I reached 152 on 03/19/14. Now I'm trying to reach 130.