ﻻ‌ ﻳﺪﺭﻙ ﺍﻹ‌ﻧﺴﺎﻥ ﺃﻧﻪ ﻓﻲ ﺣﺎﻟﺔ ﺳﻘﻮﻁ ﺇﻻ‌ ﻋﻨﺪﻣﺎ ﻳﺮﺗﻄﻢ ﻭﺟﻬﻪ ﺑﺎﻷ‌ﺭﺽ.