Here are your responses Mag40:
1. I don't see the parabola in the NASA footage. If there is one, it's scant, and explained by the dust rising up FASTER than the foot, clearly -- as it would be HIGHER than the foot, so must have risen up faster.
2. Dust "landing" is dust scuttling along the ground, as it does in real life if you kick sand. We can't see the trajectory of this sand - it's NOT VISIBLE ON FILM. So we cannot assert that it was following a parabola, when it's not visible... except ALONG THE GROUND where it's scuttling.
3. Your volleyball example is FAR away, moving to the side, and the sand does NOT rise as high as the jumper. So there is nothing to compare here. MY EXAMPLE of the volleyball player jump, is CLEAR, CLOSE, and demonstrates that the dust falls at the same rate. This one is MORE similar to the Duke Side-jump example.
4. Acknowledged! I called this "ambiguous" - obscured, cloudy.
5. The scant parabola that I don't see in the NASA footage is obviously scant... dispersion happens... so thick becomes less thick, and scant becomes invisible. Or in this case "more invisible".
6. Sure, dust is flying in many directions, and there is chaos. SOME of the sand is kicked UP... perhaps FASTER than his center-of-mass. Thus it's ambiguous. There are NO PARTICLES for which you can "track with certainty" to determine it's path. Thus, it's ambiguous. And the signs of CHAOS (varieties of launch velocities) - is a big part of the ambiguity -- we cannot ascertain apples-to-apples.
7. I'm not the only one. Dust clouds are dark.. this darkness drops to close to the ground, then continues forward ALONG THE GROUND LEVEL -- like scuttling sand.... until it hits a high-point, and then stops like a highway pile-up. That's what I see. If you don't - that's OK. I'm still claiming this to be ambiguous, because of chaos, low-resolution, and inability to track individual projectiles.
8. I think an athlete could easily do this. The 10 degree flinch in his whole upper torso is a sign of significant exertion. You don't see it that way. I'm not asking you to agree with me. Post this wherever you want. I still won't agree that this type of kick is "non-feasible", and I don't see any proof that it's not. This is just speculation on your part. This is your claim, not mine.