Good advert for headache remedies! Seriously though this is quite amusing, and NG is not just all about compelling subjects like HIV and Global Warming. Often they have used a great image like this to tie in with a paragraph in the article, say about mating and territorial habits. Are there flaws? DPC flaws? Sure. I'd crop tighter above them. Being more to the left would have been perhaps, well, ideal. A bit more sharpness with a higher s/s on motive subjects, yes.
Having said all that, to catch them at the moment of impact where the sudden deceleration has lifted their derrières is commendable. Would it be published. I think so.
What a wonderful moment to capture! Not the perfect angle, maybe, but I can't imagine you get too many chances at a scene like this. I'm really quite intrigued by this.