Which she doesn't think she can, especially if they all charge at her after the first shot.
She looks around for another exit, and sees the barn has a small hay loft, and climbs a nearby ladder to get onto it. The smoke is starting to get thick and the fire hot, and as she approaches the hay loft door she throws it open, doing her best to stifle some coughs. Her eyes are starting to tear up as well from the smoke, but looking out she sees she is near the back of the barn, and that there is no one there.