Astronaut Scott Kelly once smuggled a full gorilla suit aboard the International Space Station. He didn't tell anyone about it. One day, without anyone knowing, he put it on.
A young German aviation fan, (Willi Maier, 15years old) wrote to Professor Messerschmitt in the middle of WW2, this is my photograph of his original drawing.
He suggests several improvements to the Bf109, making the radio antenna internal, removing the tail wheel fairing, more