I remember a video from French TV at least a decade ago. They interviewd an ex military helicopter pilot. He mentionned they one saw one of those huge cigar shaped craft flying near them. Then the craft accelerated at an insane speed that would have, in normal circumstances, disrupted the helicopter due to air displacement.

But it was like the UAP was in its own bubble, separated from the environement.

One possible hypothesis is that spacetime itself is being warped in such a way that no significant forces caused by interaction with the atmosphere are being generated.

Kinda like how because you ride an escalator people no one ever hears you climbing stairs.