Song meaning of Pumped Up Kicks by Foster the People

Well, well, well, if it isn't Cowboy Kid Robert with his quick hand and rolled cigarette! Robert's dad has a box of fun things in his closet, including a six-shooter gun that Robert has taken a liking to. He's coming for you, so all the other kids with those pumped-up kicks better run faster than his bullet! Daddy works long hours, but at least he brings home surprises, like dinner packed in ice, which has clearly made Robert wait too long. He's now pulling triggers left, right, and center, and reasoning with his cigarette like it's his therapist. All the while, he's telling everyone their hair's on fire, which is just a cheeky way of calling them crazy. So run, run, run, ru-ru-ru-run!