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"Конечно, в условиях лунного притяжения хочется прыгать вверх. свободные прыжки с сохранением контроля за движением возможны до одного метра. Прыжки на большую высоту часто заканчивались падением. Наибольшая высота прыжка составляла два метра, т. е. до третьей ступени лестницы лунной кабины. ... Падения не имели неприятных последствий. Обычно при нарушении равновесия падение можно предотвратить поворотом и шагом в ту строну, куда падаешь. Если космонавт упадет лицом вниз, то можно легко подняться без посторонней помощи. При падении на спину нужно приложить больше усилий, чтобы подняться самостоятельно." (Нейл Армстронг, "Земля и Вселенная ", 1970, № 5)
Armstrong, from the 1969 Technical Debrief - "I would say that balance (while walking) was not difficult; however, I did some fairly high jumps and found that there was a tendency to tip over backwards on a high jump. One time I came close to falling and decided that was enough of that."
On Apollo 16, Charlie Duke tried to jump as high as he possibly could and, as Neil almost did, tipped over backwards and landed on his PLSS. In his 1990 book, "Moonwalker", written with his wife Dotty, he said that, as he fell, he was genuinely afraid that he was about to die but, fortunately, neither his PLSS nor his suit was damaged and the only damage to himself was an acute case of embarrassment.