I guess the Germans can make some ugly aircraft as well. This little beast was a one of a kind pilot in the prone position trainer(according to Google Translate)...
Actually it was not a trainer but an experimental test aircraft. It was built to test the effects of a pilot in the prone position. Only one was built and used for testing in 1943.
There is a book I have called something like "Kurt Tanks photo album" and in it there are pictures of this airplane after it came to grief overrunning the airport boundary.