It was a bright and sunny day over Ponyville, all except for one particular corner. Rainbow Dash, the main weather pony within the small town, had gathered a large collection of dark gray clouds over an unused section of a nearby creek. She had to be careful and vigilant to keep the angry clouds under control. Rainbow Dash had planned to spread the dark clouds over Ponyville just after sunset so they could make it rain over the town during the night. The cloud pile itself was large; larger than a barn and even that was after the clouds had been compressed as much as they safely could be. Rainbow Dash hovered around the clouds, inspecting them for any imperfections. Ponyville and its various crop fields will need the water and she had no intention to disappoint anypony tonight.
After her thorough inspection, Rainbow Dash nodded to herself in quiet satisfaction and floated up, gently landing on the very top of the clouds. She held her hoof to her brow as she looked outward to the horizon, scanning left and right for any airborne threats to her precious clouds. The sky's were open and clear. Her clouds were safe and Rainbow Dash was....
Bored.
Rainbow Dash relaxed her muscles as she abandoned her guard stance and laid down on the clouds. The next second, she rolled over onto her back and let out a depressing sigh. Rainbow Dash lifted one forehoof directly upwards while the other forehoof waved around for a few seconds as her brain to calculate which way was north and directed towards it. She tilted her head around, studying the shadows made by her awkwardly placed hooves before dropping her head back in disappointment.
Rainbow Dash grunted to herself and gently knocked on her temple, "Three, maybe three and a half more hours before nightfall," She mumbled to herself, "I don't think this 'proactive' thing really works out for me." After a final grunt, Rainbow Dash just laid there on her back staring at the blank blue sky. It only took seconds before she got bored of that too. She turned her head to the side, hoping the sight of a colored horizon might be a slight improvement.
But after a few seconds, she began to notice something. There was a spot in the sky; something a little brighter than the rest. Rainbow Dash squinted her eyes, but whatever it was too far away to make out. However, the bright little spot in the sky was growing. In fact, it was growing quite fast, which means that thing was flying very fast and possibly towards herself and the cloud.
Upon realization, Rainbow Dash felt a burst of energy as her entire body sprung into action. Something was coming, but it was still too small to make out exactly what. She hovered between herself and the cloud pile, staring into the distant blue dot. After a few seconds of futile observation, Rainbow Dash could only see that the blue dot was still getting slightly bigger, and whatever it was, it was still getting closer.
"Oh no you don't," Rainbow Dash whispered to herself as she thrust herself forward in flight, accelerating to meet the mysterious blue dot. As she flew towards it herself, her suspicions about the flying object became further evident as the blue dot started growing even faster. But what was it? It could be a very large object, very far away. Could just be somepony in Mainhatten trying to inflate the world's biggest balloon, or could it be...
...a pony?!
Rainbow Dash only saw it for a split second; it was just long enough for her brain to process the image, but not long enough for her to get out of the way. Rainbow Dash and the other pony collided in the air. The impact was hard, very hard. It drove Rainbow Dash immediately backwards and she fell into a rapid decent. The other pony, and everything else, turned to a blur in Rainbow Dash's eyes. The impact send her spiraling out of control, rolling and falling at great speeds. Instinct opened Rainbow Dash's wings, trying desperately to catch as much air as possible and slow herself down.
Until she blacked out.
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Rainbow Dash awoke with a throbbing head and pulled herself up. She groaned to herself quietly and but a hoof to her aching head. She kept her eyes shut as she focused on the pain, trying to mentally numb the pain or otherwise waiting for it to dissipate. It wasn't until a familiar voice called out to her did Rainbow Dash take a real look at her surroundings.
"Rainbow Dash, are you all right," called out the familiar voice. It was Twilight Sparkle. Rainbow Dash could tell it was her before she opened her eyes to see the purple alicorn. Twilight was obviously worried about Rainbow Dash.
"I'll live," replied Rainbow Dash. She tried to pull herself off the ground, but her hoof slipped. As it turned out, Rainbow Dash was in a small crater, no doubt caused by the crash landing. Twilight quickly surrounded Rainbow Dash with a light purple aura and used levitation magic to pull her out.
"What happed," Twilight asked.
Rainbow Dash only let out another groan before somepony else suddenly came along.
"I'm sorry, I'm sorry, I'm sorry." The ecstatic mare called out. "I'm so sorry Rainbow Dash; it's my fault." This new mare trotted up to Rainbow Dash quickly; her ears were folded down and her face leaked with genuine apology. "I'm really, really, really sorry." she added. The mare had a light blue coat, not unlike Rainbow Dash's own. Her mane and tail were wild and unkempt. They were mainly purple, but included more light blue contrast. Her body was average build for a mare, and her eyes were purple as well.
"It's ok, I-"
"Wait a minute - what just happened - what are you saying sorry for?" Twilight exclaimed, unintentionally interrupting Rainbow Dash.
"Sorry, I was flying really, really fast, and I guess I... kinda just... flew into Rainbow Dash in midair." The mare rubbed a hoof behind her head, trying in vain to hide how embarrassed she was.
Twilight was confused, "But how did you fly to begin with; you're a unicorn."
"Wha...?" Rainbow Dash took a better look at the mare. Twilight was right; the mare had a horn, but no wings. How did she get airborne to begin with?
"Oh, you know, magic." The mare replied. She suddenly started to sound a bit cheerful, a complete contrast to just seconds ago.
"Must be a powerful levitation spell." Twilight commented.
"Actually, it's a form of pyromancy."