That stuff is called mircaptain, I think I spelled that wrong. Anyway, Natural gas disperses way faster then that smell, and is also way heavier. Once we got up in the morning and you could hardly breath outside our house because if it. We sat tight and called the fire department (We don't have natural gas at our house). They came over and said that there really was not that much natural gas in the air, the leak was a long way away, we were just in a low spot and the mircaptain was coming our way.