Stranded passenger worries about oxygen supply

LaWauna Grimes, a passenger left stranded by Southwest Airlines meltdown: ‘With this breathing, like now I'm so out of breath, but I don't have that much oxygen so I just don't know what to do. I have a way to go maybe about 3.5, 4 hours. But when you're on 20% of oxygen I can't do anything but pray. But if it gets to the point where it's real bad, I'll stop at a fire station or something and ask them, may I please have some oxygen? But it's just such a, such an inconvenience a lot of this could have been avoided.’