Flutter (from the English flutter) is a harsh vibration of an aircraft, fraught with its complete destruction. It was flutter that for a long time prevented the supersonic barrier from being overcome - severe vibration, overloads and fear forced the testers to retreat over and over again. Nevertheless, the supersonic barrier was successfully overcome by a brave pilot who pressed the gas at the moment when his predecessors preferred to slow down. And there, in supersonic sound, there was silence, the joy of victory and the pleasure of gliding through the air. Through the sky. The lives of other people are also filled with moments of overcoming, because when you need to make a breakthrough in your life, going beyond the usual ideas of what is possible, flutter sets in - a harsh vibration of the soul and body. Some can’t stand it - they slow down. Only the bravest step on the gas and fall into supersonic sound. They are the ones who know the delight of victory and the joy of gliding through life. And they soar. Until another flutter comes. New opportunity for breakthrough. And so time after time...What then is “aerobatics”?