One of the reasons I doubt the 'explanation' of experiences like yours, LH, (not the experience...I have NO problem with your honesty and sincerity)... is comparing how witnesses recount sudden, shocking experiences like traffic accidents. Cars change color, and come from different directions and the identity of the driver changes...etc.
I saw a program where they staged a wild scene of some sort, then interviewed various witnesses...who had no idea it had all been filmed.
Then the actual event was shown and compared to what several honest people 'thought' they saw. Amazing variety in memories...
Now, an 'alien craft' or 'new military vehicle' would likely do the same. Those who saw the Stealth Fighter over Nevada gave wildly differing descriptions...so...*shrug*...
   I never deny ... I just wait & hope that one will land on MY lawn.