Ali bin Abi Taalib Radiyallahu 'Anhu' says:
"When Rasulullah Sallallahu Alayhi Wasallam walked he bent slightly forward as if he was descending from a high place".This has been explained in the previous ahaadith. (RU)
English reference (RU): Book 18, Hadith 118 (RU)
Arabic reference (RU): Book 19, Hadith 125 (RU)