When you get into your underwear and "dance for the man", they do a back check and you'll find out if you have scoliosis. If you do, you can't do sh!t about it. If you don't no sweat. They aren't going to find something that isn't there. Don't sweat things you can't change. Even if you have scoliosis (not likely since you don't notice any problems), you can't do anything about it now. Just go and get it over with. MEPS isn't so much Nazi camp for docs and corpsmen as much as it is a cattle drive with people barking at you telling you where to go. The idea with MEPS is to get people through as FAST as possible so they can't think about where they're going and have time to overanalyze it and want to back out (at least this is what I was told when I went down).