Ya that came out surprisingly well. You just took one picture and changed it's exposure in post? I know its technically possible to do it like that, just didn't know the resulting image would come out as good as it did.
nice work but... the pic has some issues. it would have looked better straightened out i think, the subject is not quite the most interesting, the halo around the building and some weird, ugly looking spots in the top right corner. the colors are nice but i am not sure the scene was worthy of hdri, i think a little level tweaking would have gotten you almost the same effects.