“Sleeping while walking” is not a hard skill to learn, just go by foot on a very long long plain path in the single line with your comrades , while carry your backpack with enogh weight that you can stand straight without too much efforts, if third day you can stay awake, congratulations for your steel mental.
“Sleeping while walking” is not a hard skill to learn, just go by foot on a very long long plain path in the single line with your comrades , while carry your backpack with enogh weight that you can stand straight without too much efforts, if third day you can stay awake, congratulations for your steel mental.