Cecilia's heart was pounding, she took a deep breath. "Calm down, it'll be okay." She said, but it was still racing, perhaps even faster. Cecilia began to feel very hot, she started to pant and felt very light headed. Her skin began to crawl, and her fur started to tingle. She was shedding her vision had gotten too blurry for her to see much, but she felt everything. She could feel her claws get longer and sharper, she felt the scales protrude from her body, and her toes warping into deadly talons. Her ears shrank to nothing and her tail grew thick and strong... When it was all over Cecilia stared at her reflection in the glass, she wasn't a mouse anymore, she had become a large reptilian creature.
She let out a loud, blood curdling shriek. Like nothing that had ever escaped her throat in her entire life...