The Langenargen, Lake Constance Germany Event of 1977

Richard Hall in The UFO Evidence, Vol. II presents this snippet:

February 24, 1977 Rudi Grutsch, Langenargen, Lake Constance Germany 2:30 A.M.

Two 1.1- to 1.3-meter-tall humanoids, round heads, slanted eyes, long arms, with hovering elliptical UFOs, bright illumination of area.

The confrontation or episode is briefly noted by a few UFO venues, but is generally overlooked except at this site: https://www.scribd.com/doc/36348166/Ludwiger-Best-UFO-cases-in-Europe where, if you are curious enough to seek it out, you will find the whole detailed encounter about mid-way into the article, at Chapter Five.

It's a fascinating UFO event, replete with a UFO, creatures, witnesses affected by the encounter, medically or psychologically, and other anomalies.

Here are drawings made in 1977 and many years afterward by the main witness:

I could only find the complete account at the link provided, which is an image rather than text, not allowing a capture I could present here. So you have to get to it yourselves.

But it is a worthwhile effort as there seems to be a number of elements worthy of discussion, and the account has a ring of truth about it, whether it's an elaborate hallucination or even a nightmare.

That it may represent truthful reality is up to you to decide.

N.B. You will also discover a plethora of other sightings, just as worthy of fascination, some known and some not.

RR