why don't they land on the tail instead of the nose? Seems a lot less risky to drag the back than scrape the front - which can flip the plane Is it simply the center of gravity? (engines look like they're behind)
In fact, I've just looked at a video on YouTube "AIRLIVE" [0] and you can see the shadow of the nose off the ground when the plane shakes (at 0:07s) indicating the rear gear has made contact. I think the nose contacts at 0:13, so gently it's amazing.