So hard to pick really, and unfair IMO on the 3 that missed - but, a choice had to be made.
I liked the recondite interpretations on 1 and 2, if fact I was leaning that way for a long time. 3 is a clear winner in the direct interpretation and it has good structure.
In the end I went with 4 because, although the structure doesn't conform to accepted suggestions, and although the subject is frozen, the implication of speed is there. It has good exposure and, for me the subject being "too high" in the image actually gives the feeling you're really looking up at the subject.
If I wasn't so cocky I'd be intimidated (by these four entries) from entering next months contest