Hung by a thread

It happened to a friend of mine. He was walking and a poor street boy, probably about his age, showed up and asked for something to eat. My friend said ‘Come here, I’ll buy you a sandwich’ and they ate together. After two days, this friend was walking near the same place and a group of street boys turned up and decided to steal his mobile. When he was giving it, one of the boys said ‘Hey, you are the guy that bought me a sandwich, aren’t you?’ So, the street boys let him stay with the mobile. My friend never stayed so happy for buying someone a sandwich!