I told you to go right

After hours and hours of having to watch Trixie humiliate ponies, eventually I stopped being able to watch it and stalked off back to Twilight's. She'd left much earlier, as the show demonstrated, so maybe I could ask her if she could change my voice back? Without dying of laughter, I hoped. I soon found myself on the road Twilight's house was on, and it seemed that only a small portion of Ponyville hadn't been humiliated. Almost everypony on the street looked upset, angry, or wanting vengeance. But, it seemed, I was just the thing to brighten up their day.
"Hey Thunder Mare!" Whooves shouted. "How's the voice?" A lot of ponies turned at his comment, confused at first, but then smiles returned.
"You're a better mare than a stallion, ya know!" Colgate laughed. "Fancy coming to a girly night I'm organizing?" A round of laughs promptly came from left and right on the path that the crowd had formed. Each side was packed solid. To an extent.
"I always thought you were a mare!" a mare I didn't recognise shouted from the back. I stopped.
"Ahaha," I began, speaking for one of the first times since humiliation. "Care to, ah, come out and say that to my face?"
"Alright." the voice replied. To my right, a small portion of crowd parted, and out stepped a tired looking white mare, with pale pink mane and a cross cutie mark. I think it was Nurse Redheart, come to think of it. Anyway, she trotted calmly up in front of me, sighed, and then spoke again. "I always thought you were a mare. Happy?"
"I'll only be happy once I've kicked your ass into the dirt." I growled in return, narrowing my eyes.
"Well, by the time I'm done, I won't be helping at the operating table." she snarled, narrowing her eyes. Just before I could boot her in the face, I heard Twilight shouting.
"Thunder!" she yelled from the library window. "Stop getting into fights and come here!" Before I could complain, a blinding purple flash of light enveloped my vision, before dissipating and revealing Twilight's library. I knew she'd teleported me, but why?
"Oh good, you're here." she sighed as she flipped through books, just like she usually did. "Listen, I...think I've found a spell to turn your voice back."
"Oh thank GOD." I gasped. "That's awes-wait, why did you stop before saying it?"
"Ah, well, um..." Twilight trailed off, looking up from her book. "You're probably not going to like it..."
"OK. Let's hear it." I groaned, facehoofing.
"Um, the book I read claims...that there is no way to change it back, without pain, at least. I could really only manage it by..." She paused.
"By...?" I gestured with my hoof for her to continue. The librarian just hoofed at the ground, swallowed hard, and then looked me in the eyes.
"Icanonlydoitbyreconstructingyourvocalchordswhileyou'restillconciousanditwillmostlikelybeexcruciatinglypainful!" she yelled out in one breath. I was utterly speechless. My jaw hung open, and my eyes were aching from being open so wide.
"What?" I asked, barely calm as my eye began twitching. "Do I have to be concious?"
"No, I just thought it'd make you pass out from shock, so I could reconstruct them while you were unconcious." she sighed.
"Oh thank god." I breathed a sigh of relief. "Well, how are you going to get me out?"
"No clue." Twilight calmly replied, folding her reading glasses and putting them back on her desk. "While I think, could I get you some tea?"
"Alright," I replied, "Throat hurts from all the shouting anyway."
"Ok, I'll be back soon." the lavender mare replied as she trotted into the kitchen. Looking for a way to pass the time, I went over to a random bookshelf and pulled out a random book. I didn't even read it: I just flicked through it aimlessly. Suddenly, the door opened. Considering how uninterested I was in the book, I looked at who entered. There, in the doorway, were the girls; Rarity, Pinkie, Rainbow, Applejack, and Fluttershy, and my friends, Ebony, Sky, Inferno, Fire, and Solar. All 10 looked a bit worried.
"So...Thunder....y'alright?" Rainbow said calmly, as the group stifled laughs.
"Yes." was all I had to say for them to break down. All ten of them fell onto the library floor, laughing their sides off, rolling about, and when they did stop after two minutes straight of laughing, they wiped away tears of laughter. "Finished?" I asked. They looked ready to laugh.
"Well darling, er, it's that, um..." Rarity began. I expected some speech. "...YOU SOUND LIKE A MARE!" And with that, the whole group fell over laughing again.
"I'm more of a mare than you ever were..." I muttered, rolling my eyes. Just then, Twilight returned with the tea. She looked at her friends and boyfriend on the floor laughing their socks off, and then mouthed 'What are they-' to me. All I did to reply was gesturing with a hoof to my voice box. Twilight rolled her eyes, and with nowhere to sit and have the tea, we trotted upstairs to the balcony.