That happened to me a few years ago, it was the moment I realized I needed to change. I was eating alone at burger king and he walked in by me so I smiled and gave him one of those "sup" nods. I didn't really expect him to come sit with me and reminisce over old times or anything but I figured we could at least share a nostalgia greeting, but he kind of did a double take, like he wasn't sure if I was doing it at him or not, and then just continued passing by. He didn't recognize me. You see, in high school, I was athletic, I had a nice hair cut and took care of my over all health. That day, I was wearing basketball shorts and a t-shirt with long oily hair and a full beard, plus about 100 extra pounds of fat.
I'm much better now.