Eagle River pancakes (Joe Simonton)

Plumber Joe Simonton, a former boxer and deputy sheriff, reported that a silver saucer came down by his house late in the morning, that one of three men aboard handed him a jug to fill with water, and that he was given small cakes about three inches across in return, which he said tasted like cardboard. A local judge, Frank Carter, took up his cause. The Air Force sent J. Allen Hynek, who concluded Simonton had suffered a hallucination followed by a delusion; a government analysis of a pancake found ordinary flour, sugar, salt and oil, and NICAP declined to take up the case. Hynek later wrote that Simonton's story fitted European fairy-lore patterns, and the case became a stock example of the absurd in UFO reports.

Single-witness experience; the only physical sample was an ordinary terrestrial pancake

• Wikipedia: Eagle River encounteren.wikipedia.org