<sod >Footage taken at the scene on Saturday night shows crowds watching in astonishment as the have-ago-hero climbs the four floors in less than a minute to pull the four-year-old to safety.< eod>< sod > Footage taken at the scene on Saturday night shows crowds watching in astonishment as MrÂ Gassama climbedÂ the four storeysÂ in less than a minute to pull the four-year-old to safety.< eod>