August 1988, I was 19, parents away abroad so teenage party prevailed. It was one of those rare but fabulous nights (in the UK!) warm with a starlight sky. We were all laid on the front lawn (after booze yes & before sex obviously) staring at the heavens and talking philosophical nonsense as teenagers do. Then something triangular, unlit and very quiet flew overhead. I can't say how big it was because there was no point of reference, It was a moonless night & it only blanked out the stars. That was the only way anyone saw it. There was lots of "Whoa, what was that?", "Did you just see that?" etc etc. But tbh, it was quickly overlooked, sex was on the agenda after all! I must add this was in East Anglia, Mildenhall, Lakenheath etc about 30 miles to run, in aviation terms "just down the road"