Really nice shot. The light playing off the dust trail adds nicely to the composition and tells the story of his chosen line. Shame about his abrasiveness above.
What you have here is branding, rather than a watermark (and yes, your logo is quite nice, I wouldn't argue there). To be under consideration the watermark needs to be small, in a corner and preferably with a reduced opacity - it should never take your attention away from the photo itself. When it is that big, bold and central means it dominates the photo and therefore rules this out as a POD, which is a shame as it is a lovely photo and looking at it again, I am sure I would make it POD, if you fixed that. Have a look how guys like Sterling Lorence watermark their work to see how it should be done.