Make sure you label your pictures when you put them up (put numbers along with them so it's easier to comment on each one).
I have to leave but I wanted to say the first one looks great! Not sure if you planned it or not (most silhouettes are accidental from newer photographers) but it doesn't matter. I really like the way the shot looks. #4 looks pretty good too, the other 2 you have to definitely up the shutter speed to stop the motion. Otherwise huge improvements!