Originally Posted by
Ascend Charlie
They never saw a silhouette (which would be the outline against the sky) because it remained in the same relative position, getting closer from below, until the rotors hit the windshield.
Sorry Ascent Charlie, my poor choice of words. I should have said "outline shape" realising that outline was against the cluttered background as seen in the video from inside the helicopter. I will amend wording of my post. The outline shape is seemingly quite different between the flipped image and the view from within the cabin of -XH9.