This case has been mentioned as part of several threads but it is such a strange encounter I think it deserves its own, a thread of which I was not
able to find. The main witness, Haraldo Westendorf, has produced the drawings you will see in this thread as visual representations of his encounter.
He says they have been drawn to approximate scale. The quoted text in this thread is from the following website, which is also listed in the sources:
"Westendorf is 40 years old, a father of three children and a successful businessman. He is also an avid private pilot rated for acrobatic flying.
The following account is based directly on his one-hour...