That must have been one the more bizarre shot downs of WW2. Very reminiscent of the first months of the Great War in 1914, when crews were taking pot shots at each other with service revolvers.I did a search and don't think this one has been covered on here before.
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Two US airman flying their unarmed Piper Grasshopper spot a German equivalent Fieseler Fi 156 Storch flying beneath them.
They then shoot it down using their pistols and capture the Germans!
Full dit below.