Your comment made me go back and look at some old pictures of myself, which was hard because I hate pictures of myself so I try not to keep many around. A striking one that I can't escape, however, is my ID photo. I look so different, it's crazy. I was so thin in high school, because I rarely ate and never worked out at all. My cheeks look hollow and my neck is tiny. (I like the way I look now better, but I've put on a little too much weight, I think, so I'm trying to get rid of it) My hair was crazy. My nose looks different, somehow, but that's probably just because the rest of my face is so different, so the contrast makes it seem like it's changed.
Anyway, yeah, growing up I guess. Another thing that is strange is seeing kids in high school now. I haven't gotten any taller than I was when I was that age, but when I see someone who is still in high school they just look like kids to me. It makes sense that they do, but I'm not sure when that transition really happened.