My father told me - when he served in the military school.The case was in the winter, the ice was covered with snow and the plate was slippery.There the sergeant, going ahead, slides and begins to dance, swallowing his hands, this show lasted for 5 minutes, all frozen in expectation when he collapses.In the end, he stillins balance, turns to the students and with a very serious look says "I slide, but I never fall."