Shot down, or crashed? Either would be possible, I suppose. I know a guy that believes the UFOs are from a spiritual plane. He’s described his sightings to me, usually in proximity to military bases. What he describes sounds like afterburners, to me. But he believes in them. He also smokes a lot of weed and claims divinely inspired dreams.
We sense three variables of space and one of time. Add one more variable to the spatial component and real physical 'thjngs' take on interesting properties ... like appearing in a six sided room without coming through an opened door or window (Christ's appearances int he Upper Room, etc.).
As to dimension time, events happen in a present moment but are sensed by us from the past and our brain does a processing feat which we image as present.
A wonderful Freeper gave to me a great way to abbreviate this: without time, events do not occur; without space a thing does not exist IN the Unioverse God has created.
The UAPs are real and physical when in our 4D limits well, but may in fact be able to exercise a fourth variable of dimension space and exit our sensory functions, then re-enter our 4D limits.
When God raptures the Body of Christ, the members of that body will instantly disappear as extra dimensionality is given the new body and behavior mechanism into which our alive-forever-more spirit is located then. That newly made/created body is caught up into the clouds to meet the Lord in The Air, while completely invisible to the folks not caught up, not transformed in the twinkling of an eye.