Why was Ginger moving worriedly inside the stable?

Ginger was in the stable when the fire broke out. She was worried about the fire and tells Beauty that if she hadn't heard his whinny she wouldn't have had the courage to be led out by James.

A tall, broad man stepped forward and took me, and James darted back into the stable. I set up a shrill whinny as I saw him go. Ginger told me afterward that whinny was the best thing I could have done for her, for had she not heard me outside she would never have had courage to come out.