>Far away, in the depths of the nothing between the multiverse, three universes collide, then bounce off.
>One of the universes contained a reality warper. He was Telekinesis Seeker.
>The other contained a mad scientist. He was Engineer.
>They both happened to be exploring a decrepit castle, and they both happened to be inside a room containing a large organ, when the universes collided.
>Both of them were shunted into the third universe, which contained no Anon.
 
>You blink.
>Everything seems... Different.
>Not the least of which is that there's another you that isn't you.
>Hopefully it's not another mirror clone.
"Hail!"
>He turns around and waves.
>"Hi! What brings you here?"
"I was looting this castle when I suddenly felt like I was pushed into another universe."
>"Same here!"
>You both stop and think for a bit.
"So, what's your name?"
>"Anonymous. Yours?"
"Anon Yttri Mous."
>Introductions made, you continue looting.
>This castle has no loot, however, so it's a fruitless endeavour.
>Anonymous starts playing random notes on the organ.
"What're you doing?"
>"I think this organ controls parts of the castle. But most of the keys aren't connected to anything."
>You think for a bit more.
"Are you thinking what I'm thinking?"
>"Rig up the organ so it can control the castle like a giant mecha?"
"Damn straight!"
>You and Anonymous start building.
>What Anonymous's mechanical expertise can't achieve, your complete disconnect from objective reality can.
>In a couple hours, you've constructed the Castlemech.
>It's pretty sweet.
>Not only is the organ connected to almost every part of the castle, it's also loud enough to hear from the outside.
>"Now. Can you play the organ?"
"I can certainly try."
>You sit down at the organ, crack your knuckles, and start to play.
http://www.youtube.com/watch?v=15H6CYhVKAA
>The castle wrenches itself out of the ground, and walks over to Ponyville.
>You continue playing, and ask Anonymous for a glass of water.
>He salutes you, and exits.
>The Castlemech dances for a while, wrecking the town with it's haphazard steps.
>Anonymous returns with a glass of water.
"Thank you."
>You accept the water and continue to play with one hand.
>This sure is exhausting.
>The Castlemech keeps up the groove.
>"You know, you're killing literally nopony."
"Well yeah."
>You take a sip of water.
"That'd be bad."
>You put down the glass of water as the song gets a bit more intense.
>The Castlemech starts breakdancing.
>The intense part finishes with a flourish, and Castlemech leaps to it's feet and starts running for Canterlot.
>It gets to the edge of Canterlot, and you run out of song.
"An organ's like a piano, right?"
>"Right."
http://www.youtube.com/watch?v=mS8FEfhYvEo
>The organ sounds like a piano now.
>Probably because that's how you're playing it.
>You don't know many organ songs.
>You don't know much about instruments in general, but apparently you can play them.
>That's fine with you.
>Anyway, Castlemech starts wrecking up the place.
>You have long since stopped caring, as this couldn't possibly be your universe.
>For one, Canterlot isn't flying.
>The princesses fly out of their boring, non-mobile castle and try to attack.
>You block their magic with a few well placed notes that just happened to fit in the song.
>Then, you grasp them with all the tenderness your mech is capable of, and toss them inside.
>They'll figure out how to get here eventually.
>You didn't change much beyond the layout of the entire castle.
>Suddenly the song starts going off key.
>"They're destroying Castlemech from the inside!"
"How rude."
>That song ends, and you move onto what you suspect will be the last song.
http://www.youtube.com/watch?v=DGayBVLct20
>Castlemech picks up a spire from one of the towers nearby, and starts dancing.
>You drink the rest of your water, and put all your skill into the song.
>Some of the keys start becoming unresponsive, and others start going higher or lower than they're meant to be.
>Ominous groaning sounds emanate from the walls.
>"She's goin' down, Cap'n."
"I'll play her off. You go."
>"No, I'll stay by your side until the bitter end."
>You continue to play, and the song gets more and more warped.
>Loud cracking noises pierce the song at intervals, and finally-
>Castlemech collapses.
>You and Anonymous crawl from the wreckage, and bow to the growing mob.
>Then, you grab Anonymous by the shoulder and stop being there.
>You have ceased to exist.
>Bad end.