I got to the field today to find out it was entierly to windy for me to fly the foamy that I took out. When I got there there were only 2 other people. The one guy that was there flys a very nice composite 35% extra. He is a really nice guy and has helped me a alot as I have been learning so I decided to hang a bit and watch him fly and give him a hand with anything if he needed. Walkin over to him I almost said "Nice its still in one piece" but stoped my self at the last second being the supersticous person I am. I thought to myself dont ever say some stuff like that cause the first time you do he is gonna take off and end up crashing or something crazy. Well I go over and start talking to him and he tells me how he finaly got his engine all broke in and tunned right and he was really happy with his plane. He fires it up takes off and all goes great for the first couple minutes, it really was running good. He comes down the runway full speed inverted about 30' up and had a brain fart and pulled back on the stick instead of pushing up to climb. In less then a second it went from straight level flight to in the ground. I felt so bad I couldnt believe what I just saw. I have seen some small planes destroyed before but never anything like this. He wasn't doing anything out of the normal he was just overly tired and stoped concentraiting for a split second at the wrong time. This was a big reality check for me. Even someone that expierenced can crash that easly just by small lax in concentration. It will deffinatly force me to focus more on what I am doing while flying. I can get pretty lax at times esp since I have been pretty board with the trainer I have been flying.