[OOM: It's really not Fluttershy's
night.]
The front door opens and slams so quickly that you might not think someone could get through it in time. But someone has, and she's now pressed against the wall right next to it, breathing heavily.
After a few moments, her expression goes from simple terror to bewildered panic. Very slowly, she takes one hand off the wall and brings it up in front of her face. Then she freezes completely. She looks like she's screaming, but no sound is coming out. (Probably no air is getting in, either; somepony want to do something about that?)
[OOC: For the curious: human!Fluttershy is a bit over six feet tall, and not particularly curvy. Her hair is still pink, and her dress matches her usual fur and feathers - including the trio of butterflies on each hip.]