Ключевые слова: activity, adrenaline, aero, aerobatic, aerodynamic, air, black, boy, children, coach, costume, dynamic, emotion, enjoy, equipment, experiment, extreme, flight, fly, freedom, fun, glasses, gravity, happy, helmet, high, hobby, hover, inside, instructor, joy, jump, leisure, lesson, levitation, man, night, recreation, simulator, skydiving, sport, sportsman, stream, teaches, team, teenage, trainer, tube, tunnel, wind,