set+flying
131stunt flying — ▪ aviation the performance of aerial feats requiring great skill or daring. Stunt flying as a generic term may include barnstorming (see below), crazy flying (the performance of comedic aerial routines), or any spectacular or unusual… …
132unidentified flying object — also called flying saucer any aerial object or optical phenomenon not readily identifiable to the observer. UFOs became a major subject of interest following the development of rocketry after World War II and were thought by some… …
