When he heard angry screams and the hammering of hatchets on the door of his shack last week, Malawian Folias Sakai thought he was about to become the eighth person to be killed in anti-immigrant attacks that have swept South Africa this month.
Instead Sakai managed to escape the mob by scrambling over the metal rooftop of his shack in a Johannesburg slum into the safety of a nearby alleyway.