[egfowler3]

Probably just a sonic boom, like this:

https://www.youtube.com/shorts/u8kBEAsXMUQ

[frank ballenger]

great item I hypnotically listened to a few times.

By the way, one of the UFO sighting mysteries is some of the alien vehicles make no sonic booms but obviously move over huge amounts of sky quickly. Evidence of possible interdimensional or time travel by them.