Grab her and push her into the stall.

You try your best to make it to your clothes and high tail it to an empty stall. You just grab your clothes and run when Annie emerges from one of the stalls and giggles again. "I didn't actually think you'd do it" she smiles shyly. "I'm actually a little suprised from you John. Though I must say, you do look aweful sexy in that thong". You blush, not sure whether or not you enjoy the attention you're getting from Annie.