Security camera footage captured by web designing service Karagoz Teknoloji in Turkey, shows a woman arriving to a supermarket with a young boy and a baby in the pushchair.
The pushchair rolled away down the hill where it was briefly out of sight.
The woman was seen anxiously running behind the pushchair as it went down the street.
Local media reports say the pushchair fell off a three-metre-high wall on to the pavement.
Reports said the baby sustained light injuries thanks to the safety belt and rushed to the hospital mostly for precaution, but was in good condition.