There are many unusual sports that have been part of the Olympic Games as demonstration sports. Gliding, or aeronautics, was demonstrated in 1936, and also a gold medal awarded for Swiss Hermann Schreiber for a flight across the Alps in 1935. The IOC were ready to add this as an official sport in 1940, only for the Olympics to be cancelled by the outbreak of war. There was plenty of aeronautic skills shown in the skies during the war, but unfortunately it was never again considered for the Olympics. See more about Aeronautics at the Olympics.