There is always talk about young unicorn fillies having an episode of arcane bursts. This is a very rare accident, and it's not much of a huge problem. But what if Twilight, instead of passing her enrollment test without a scratch on her, cast an arcane burst triggered by the Sonic Rainboom?

Twilight was extremely nervous about taking the enrollment test in order to partake in Princess Celestia's School for Gifted Unicorns. Sure, she'd been practicing even before her parents offered to sign her up for the school in Canterlot, but this was her big day! The day that would decide whether she would be eligible or not. This was going to mean a LOT to her!

Twilight and her parents walked into the empty classroom, except for a few Unicorns that were there to judge Twilight's performance in her test. She looked back at her mom and dad, who gave an encouraging smile, and then looked back at the judges. Then, through the doors on the opposite side of where they came in from, a pony came in with a small wagon with a rather large egg on it. On the side of the wagon was a picture of a baby dragon hatching out of an egg, which indicated that Twilight had to use her magic to hatch the egg that was on top of the wagon.

"Well Miss Sparkle?" said one of the judges, "We're waiting!"

Despite practice at home Twilight had seemed to struggle trying to get her darned horn to do it's work. Her face scrunched up, trying to "push" the magic out of her horn and onto the egg. She loosened up and exhaled in exhaustion after her failed attempt. She tried again. Nothing. She looked up at the judges with a sad look on her face.

"I'm sorry wasting your time," the disappointed filly weakly finished.

The judges were just about to wrap it all up when suddenly....

BOOM!!!

The loud, startling noise scared the young unicorn so much that the adrenalin caused her magic to burst out of her horn and onto the egg, thus hatching it! However, Twilight couldn't stop! Her magic went out of control, sending out shape-shifting spells on her parents, the judges, and an aging spell on the newborn dragon, turning him into a confused, adult dragon!

Princess Celestia was walking peacefully on the walkway near the building when she noticed the commotion. She flew in to see what was going on, only to be blasted to the wall when Twilight's magic had exploded! Thankfully, the Princess didn't go unconscious. She realized that the purple unicorn's magic had gone unstable! She quickly used her Alicorn magic to calm the filly down, and change everypony else, including the dragon, back to normal.

Twilight just lied there, lacking consciousness.

"MY BABY!" her mother cried! She rushed to her daughter, followed by Twilight's dad, the judges, and Princess Celestia. Twilight's mom put a hoof on the poor filly's neck.

There was a very, very weak pulse found.

The unicorn's dad looked up to Celestia, "What happened???"

The Princess's face was very grim, "It seem's she had caused an incident that very few filly unicorns have face in their lives. What this was, was an arcane burst."

The mother and father unicorn stared blankly at the Princess for a few long seconds. Twilight's mother then burst into tears and her father just stared back at her daughter in disbelief.

Celestia, being too afraid of what might happen in the future if she left twilight unsupervised after this incident, she approached the ponies a little closer.

"I will  take Twilight Sparkle under my wing to guide her through recovery from this horrible accident, and also teach her magic under my private studies."

She gave out a little smile, "I also believe that she may have the potential to be successful in her studies." She motioned her head towards the now stirring Twilight, at her flank, where a glowing image appeared. It was Twilight's cutie mark; the symbol that marked her destiny in magic.