I saw something 20 years ago at high altitude on a clear day, I noticed the glint of metal and looked up and saw it at maybe 30k feet and with no contrail. Then it simply went higher and was gone. Almost instantly. Don't know what it was, but it was deffinitely odd and impossible, from what is publicly known physics behavior.
I watched it.
I saw my first UFO at age 17.
Saw several high in the sky over the next couple years doing "maneuvers".
Spent decades flying airplanes and never saw a thing.
I saw something 20 years ago at high altitude on a clear day, I noticed the glint of metal and looked up and saw it at maybe 30k feet and with no contrail. Then it simply went higher and was gone. Almost instantly. Don't know what it was, but it was deffinitely odd and impossible, from what is publicly known physics behavior.