Regular or Unleaded?

We had a small natural gas leak in our home this last month, and I was in the process of getting it resolved. The kids were always telling me they smelled natural gas as we were working on it. Then a week or so later, Dahlia told Mindy she smelled gas again. When Mindy went out to the living room, there was Dahlia sniffing and she said, "I think it is regular gas." Julia was right next to her, and sure enough, had a loaded diaper.