I really like this shot! I think it's mainly the concept that makes it so intriguing... The timing is fantastic, especially with the spontaneity of things, and how none of them are actually looking at us. You've captured it in the moment, in that sense.
It has a great sense of balance. I like the atmosphere created from the black and white contrast as well as the.. rain?
Awesome stuff, either way. I don't have any suggestions, other than the quality, but it's not as if you can do anything about that, as such.