I had to visit the concert of A. Gorodnitsky - the author and performer of his songs, and by the profession of geophysics, in his words, almost literally:"There was post-war time, there was a fashion for all the military, decided to go to Peter in the mountain (there is a form in the form of a uniform with pans), the mandatory catch then to enter the geophysics was a jump from a 3-meter trampoline, it should be noted that neither physics nor mathematics I loved. Climbing up on the trampoline, and standing up a little, I thought about it, realized that it wasn’t all mine and decided to turn around and leave with shame. But at the turn the trampoline bended under me, I slipped and crashed into the water, the jump was counted. So I became a geophysicist"