In London, my nephew Jack & his friend 'Little Rob' came out of the tube - 'subway' to you, and were surrounded by 6 gang member with knives, asking for money & their phones. Jack told them they were making a mistake, but they persisted. One minute later the two who remained standing were running down the street, and the other four were on the ground.
Oh, i forgpt to mention, Jack has been to Korea to train & be trained in Taekwando, he teaches it in London, and Little Rob also practises Taekwando........