Fast! : ) which line most strongly suggests something good is about to happen to the protagonist?

when the window flew open, zena flinched as if startled, then resumed chewing her fingernails nervously.
when the window flew open, zena had a thought, a glow of shining hope that something had changed.
when the window flew open, zena paused, catching her breath and gasping at the sudden rush of cold air.
when the window flew open, zena wanted to rush from the room and seek out a dark, quiet broom closet.