What happens when a sonic rainboom has side effects?

When two ponies with big dreams are stuck in each other's bodies, what will they do to be normal again?

Slowly, Surprise opened her eyes. That rainboom had been so far away. How had she felt the shock-wave that badly?

She looked around. There was another pony lying on the ground nearby, also a Wonderbolt (to her surprise). She tried to flap her wings, but felt nothing.

Shocked, she looked at her sides, hoping they hadn't been hurt. Instead, she saw a pristine, wingless blue flank. Surprise did a double take at the fallen pony. Glimpses of white coat, poofy yellow mane...

It was her!

Trixie awoke rather rudely, to a pony shaking her shoulders.

"Why do you disturb the Great and Powerful Trixie?" She yelled, preparing a bright flash of magic. She opened her eyes all the way when nothing happened. Her back felt really heavy, though.

"What did you do to keep the Great and Powerful Trixie from using her marvelous magic?!"

"I didn't do anything!"

"Why do you sound like the Great and Powerful Trixie?" Trixie shook her head, clearing the fuzz from her eyes. "Why do you look like the Great and Powerful Trixie?!"