I prefer this gray scale version over the colored version of this. The tonal variations, the subtle textures, and the overall atmosphere lends itself very well to gray scale. The colored version seems to lose some of that in translation because the vividness of the colors detract from those qualities. The airplane seems to explode through the clouds here, but it looks flat otherwise. The umbrella and some of the residual colors (like the yellow umbrella up higher in the picture) otherwise detract from the focus.

The vertical composition, the way the images are placed, the explosion of the jet and the way the umbrella latch droops down give this image an exhilarating gravitational effect.

It would be interesting to see if you could add even more height and more gravity to this. I think a longer (not wider) image may add to this effect. Perhaps with the addition of a the building that you used in some of the other versions of this picture would give this even more height if properly used.

As it is now, this image works very well.