Your vision left you the second the vortex pulled you in. In fact, aside from a sensation similar to when you lean too far back in a chair and suddenly realize you're about to fall, you didn't have any senses left at all. You were right in the middle of trying to figure out what just happened (and trying not to freak out) when, with another sensation, this one similar to getting punched in the stomach, you found yourself laying on your stomach on a hardwood floor. You try to move, but it feels like your arms and legs are asleep, so instead you focus on listening, and realize someone is jumping around you.
"Hah! It worked! It actually worked! Princess Celestia and Twilight Sparkle were right! I successfully pulled a human into Equestria! Hahahah!" You aren't familiar with the voice, and you force your head up just enough to get a good look at the source of the noise, not entirely sure if you heard everything right, or if your mind is just playing tricks on you. You open your eyes, and after a flash of light and color, everything regains focus. You see yourself staring at a cyan pony with a lyre cutie mark, and a huge grin on her face.
"Lyra? What?" You mumble, still heavily disoriented from the spell. As you regain feeling in your arms and legs, you slowly move to a sitting position, and you realize you just said something you shouldn't technically know. You begin to think of a way to counter the obvious questions, but to your surprise, she doesn't look suspicious. In fact, she only looks more excited, and begins laughing again.
"Hah! The knowledge spell worked too! It already knows my name!" Well, you certainly weren't expecting THAT. "You know about Twilight Sparkle, the Elements of Harmony, Discord, Princesses Celestia and Luna, and all sorts of other things too right?" You nod slowly, attempting to soak everything in as the unicorn nearly gives a squee of excitement.
"I can't believe all of this is actually happening! Twilight and I were supposed to do the spell together, but, well-" suddenly a large booming noise, like thunder, comes from outside, and for the first time since you've got here you see Lyra drop the grin, and look genuinely worried.
"THAT, is why Twilight couldn't help with this. Dreamweaver some how got wind of our plan and ambushed all of Ponyville. The Elements of Harmony are fighting him off right now, but they need your help. The Elements don't actually have their... Elements." Lyra explains, giving an annoyed glance at the ground as if bothered by her own phrasing, but you understand well enough, and get to your feet.
"Yeah! Good! You get up, I'll lead you outside. Watch your head. I can answer a few questions on the way to the door, but we really need to hurry!" You stand and realize you are only a few inches shorter than the ceiling, and idly note that you'll have to duck past every door between here and outside. You also notice something incredibly strange...
You're wearing a different set of clothes.
Instead of your usual attire, you find yourself wearing a purple t-shirt the same color as Rarity's hair, and white pants the same color as Rarity's coat. Considering the colors and the fact that the clothes fit exactly how you'd like them to, it's easy to tell who made them. After the pants you see a pair of black boots, made of some material that feels both incredibly durable and comfortable. If you wore glasses or contacts before coming here, then you find that you no longer seem to need them. You also notice what you guess is the summoning circle used in whatever spell brought you here, and also several sets of clothes just like the ones you are wearing, but in different sizes, scattered all over the floor among stacks of open and closed books.
You process all of this in a few seconds, and hear another boom coming from being you. You turn and see a large window, and while your vision is blurred by the light rain, you see the Mane Six in the distance, surrounding a cloaked unicorn.
"Come on!" Lyra says, rushing out the room and turning left.
What's your plan?
-Ask Questions-
Get some knowledge while rushing to help the Mane six.
-Demand Answers-
The Mane Six can hold their own for a bit longer, but you REALLY need to figure some stuff out before you can decide what to do, or even what you CAN do.
-Demand To Be Sent Back Home-
Someone else can save the day. You've got too much going on at home to be here right now, and you aren't entirely sure you're the right one for the job.
-Rush Outside-
Questions can wait, the Mane Six need you NOW.
-Jump Out The Window- Wait, seriously?!
It'll get you outside even faster, and you THINK this room is on the first floor. MAYBE second.