I came home yesterday and the bloke opposite was obviously having problems with his backpack brush cutter/snipper and had been dealing with the problem for a while from the look on his face. It was starting ok but stopping after a few seconds of running. I walked over took off the petrol cap, blew through it and told him to try that. The look on his face when it kept running was priceless, because when I blew through it I could see in his eyes like, what are you doing