I like the first plus the last 3 of your set. The first has a nice surreal quality to it from it being hdr. The fact that you can only see the girls back adds a little mystery. Pity she wasn't focused on a more interesting subject though.
Like the way you have caught the action of the guy with the skateboard. This almost looks hdr too - maybe its my eyes. Have you made a copy of 3 different exposures from a single RAW image with this shot by any chance? Or is it simply finished in photoshop or equivalent?
Really cool photoshop trickery with the last two - would like to know how you did the mirror shot?