What doesn't kill Jackie makes her invulnerable

Landing with a soft thud on the pavement after jumping out from the second story, Jackie sprinted home at a blistering pace. She hadn't worked out in a whole day, and this was a free opportunity. And she knew she wanted to play with her new shapeshifting power more. Parked cars rattled as she breezed by them, and a trail of dead leaves followed in her wake. It took her a whole block to decelerate from her run, watching the foliage settle. Making a mental note to practice her quick starts and stops, she took off again.

Back at home, she put her shopping bags down and went to get a glass of water. Sitting at the dining table, she concentrated on simple things, like changing her hair color, seeing it transform from the root to the tips into the color of spun gold, as it lengthened down to her waist. Then, from the deep golden hue, it become paler and paler, almost white in appearance, while transforming from arrow straight to large curls.

Spending all her mental energy on her transformation, Jackie didn't realize just how tightly she was still gripping her glass of water. Her new strength was too much for the container to withstand, as it cracked and shattered into fragments. She gasped in pain as she released her hold immediately, and the rest of the shards fell to pieces on the ground.

"Fuck!" she yelled, nursing her bleeding hand. Clutching her hand and running to the sink, she put it under cold water and started to reach for the paper towels. Oh god, she hoped it wasn't bad. What a terrible way to end the second day of her self improvement and discovery.

But as the water cleaned the blood from her hands, she noticed the flow was receding incredibly quickly. Maybe it wasn't as bad as she thought. Turning her hand, she saw the skin on the palms of her hands reforming, resealing themselves shut. The blood and water ran down the drain, leaving her hand looking as pristine as before.

"Oh my god...," she whispered. With quivering hands, she went to pick up a shard of glass from the floor. Grimacing, she steeled herself as she dragged a piece of it lightly over her arm, expecting it to scrape some skin. When nothing happened, she applied more and more pressure, but her skin was barely giving way. What was happening?

Again she underestimated her own strength. The shard now cracked, leaving a chaotic spiderweb pattern. Her skin was still unharmed. She tried dragging it over her palm where it cut her the first time, but now it just crumbled into pieces and fell into the sink.

"Did I... did I just learn not to get hurt?!" She took a knife and again, gingerly placed it on her skin. She could still feel the cold steel, but it wasn't uncomfortable, and it didn't feel sharp. She grabbed a tomato and easily pushed the knife through it, making a clean slice.

Putting the knife back in the block, she took a deep breath to calm herself as she shook her head, causing her platinum blonde locks to flow back and forth. Two days ago, she was a high performing academic. Now, she was a high performing academic with superhuman strength, seemingly infinite stamina, invulnerable skin, and the ability to turn her best friend into a writhing mess with a single touch. Her heart beat with excitement as she felt herself getting turned on from her power.

She couldn't wait to unlock her potential further.