I can say that I (and a friend) once saw a flying object that we sure couldn't identify...

It looked like a helicopter searchlight shining through some, well not fog, maybe just moisture in the air...

Didn't seem to move in any unnatural way, but then I pointed out the stars - that sky was worthy of telescope work...

There was no sound. This was around 3 in the morning while we were hiking (yeah, in our twenties we did crazy things like that).

We weren't partying on anything that night, or even that week. (as in, no drugs or alcohol).

Then it just sort of faded away...

It was weird enough that we agreed we weren't going to tell anyone about it...

Neither of us concluded we'd seen anything alien, but we sure were scratching our heads and talking about it for a few days...

And to this day we'd have no explanation better than we'd have had in the moment...