Deep in the heart of Toon City, there was the Toon City Concert Hall. As the name suggested, it was where toons would come for concerts, either modern or classical. However this was no ordinary concert hall, as you'll see as the story progresses.

"Well, looks like it's my first day." Lincoln Loud said dressed in a tuxedo as he walked inside.

He made his way through the beautiful orchestra room and into the rehearsal room. There, he met some surprising people.

"Lincoln! Good to have you here!" Gumball and Darwin, two cellists, greeted as they high-fived.

"I didn't know you got part-time jobs here too." Lincoln acknowledged.

"We sure do." Kick said. "So, what instrument are you on?"

"I'm on the trumpet." Lincoln answered. "You?"

"Along with Kendall, Mordecai, and Rigby, I'm on trombone."

Just then, Lincoln's sisters, sans Lily, arrived.

"Hey, girls!" He greeted.

"Hey, bro. Got a job here, too? Nice." Luna commented. "I'm on timpani drums."

"Violins." Lori, Lisa, and Lola said.

"Chimes or triangle. I don't know how you play a shape, though." Leni said.

"I bet it's the only instrument she knows." Master Frown, an oboe player, chuckled quietly only to get elbowed in the gut by Unikitty, another trumpet player, and Puppycorn, the pianist.

"Be nice." Unikitty scolded.

Back with the Louds…

"Oboe." Luan said.

"I'm on cymbals or snare." Lynn said.

"I got the clarinet." Lucy deadpanned.

"Double bass." Lana answered.

Suddenly, the doors flew open to reveal the LPS pets: Russell, trumpeter, Sunil, clarinetist, Vinnie, xylophonist or saxophonist, Zoe, cellist, Penny Ling, flutist, Minka, and Pepper, double bassists.

"Are we late?" Russell asked.

"No, we still have plenty of time before the show." Richard, another violinist, informed dully.

"Oh, hey, Richard." The pets greeted.

Just then, the pets where flung across the room, when the doors flew open again to reveal, Star and Marco, two more trumpeters, SpongeBob, double bassist, Patrick, tuba player, Mr. Krabs, cellist, Squidward, Eileen, flutist, and Clyde, another tuba layer.

"Man, the traffic on the way here was insane." Star panted.

Over with the park gang, Mordecai was straightening his bowtie, Rigby was tuning his trombone, Muscle Man was combing his hair, Skips was polishing his bassoon, and Benson was cleaning his clarinet.

"Man, I hope tonight goes well." Mordecai said.

"Chill, we've been practicing for weeks." Rigby assured.

"Yeah, don't let it get to you." Skips added.

"You know who else has been practicing for weeks?" Muscle Man snickered.

"This is no time for your jokes." Benson said.

"Not cool bro."

"Hey, has anyone seen my flute?" Hawkodile asked.

"Have you tried your pocket?" Dr. Fox suggested.

The royal bodyguard/flutist reached into his back pocket and pulled out his flute.

"Oh, right." He chuckled nervously with a blush.

"Hey, Lame-O." Ronnie Anne, a bassoonist, greeted as she punched Lincoln's arm.

"Hey, I heard you play the bassoon." Lincoln said.

"You bet."

Just then, a tall man, who was in his twenties, with short brown hair, a somewhat thick beard, brown eyes, and wore a tux with a blue tie and brown shoes, entered the room.

"Hello, everyone." He greeted politely as everyone greeted back. "I am Lawrence Mendelssohn, your conductor and the owner of this hall."

"Wait just a minute." Richard and Lisa said.

"If that name sound familiar, it's because I'm related to Felix Mendelssohn." Lawrence explained.

"You're descendant of him?" Russell asked excitedly.

"Why yes, Russell. But enough about me; the shows starting so chop-chop." He said.

"Wait, what piece are we playing tonight?" Unikitty asked.

"You'll see."

"Wait, what about Murphy's Law? Milo's here." Melissa, a French horn player, asked.

"Got any countermeasures?" Milo, a tuba player, asked.

"Every single possible situation and more." Lawrence assured.

"Are you sure?" Zach asked as the conductor nodded

In the orchestra room, it was already packed. All the musicians took their proper sheets and looked at the sheet music provided.

"Looks like we're playing the 1812 Overture." Kendall said.

"Just wish they included cannons, though." Kick lamented.

"Don't want to risk scaring the crowd and/or having to deal with all that paperwork." Lawrence told the daredevil. "But I have something planned. And before you ask, you'll see."

Once everyone was in their seats, Lawrence raised his baton and started to conduct. It went smoothly with the simple Russian Orthodox hymn Lord, Save Thy People.

"So far, so good." Dipper, a French horn player, thought.

It then transitioned to the French National Anthem. Then, the melody of the Marseillaise was heard competing against Russian folk music. After that, instead of cannon shots, this happened. In place of the cannons, instead, Hawkodile's flute fired off a cannon shot, complete with sparks and smoke.

"What the…?" He wondered.

Over with Puppycorn, his piano did the same thing, blowing the lid off. Shocked and still playing, the dog looked inside the piano, only to get his face blackened by a second explosion.

"What is ha-?" Mordecai though before he was cut off when the trombones exploded, knocking the trombonists back.

Still, they continued to play as they got back up; feeling super compelled to do it. Over with the French horn players, Mabel looked into hers.

"What is going on?" She wondered as he face was blackened by the resulting blast.

The audience was in shock and awe at what they were watching. The music then began to descend. After descending for a good several seconds, the same hymn it began with repeated. This was Leni's cue to bang on her chimes.

"And now for the finale." Lawrence said.

They then all played the melody of God Save the Tsar. Then the same bizarre thing happened. Unikitty's trumpet fired off a cannon shot.

"What the heck?" She wondered.

Over by the strings, the same happened with the blasts shooting out of the scrolls, startling them. Vinnie's saxophone fired a shot as well, knock the sheet stand over. Sunil and Squidward's clarinets do the same.

"What is happening here?!" Sunil shrieked.

"I know, right?" Squidward said.

But it wasn't over yet. Luan and Master Frown's oboes exploded as well, knocking them over.

You okay?" Brock asked as they gave thumbs up.

Of course you probably get it by now. Then it was Milo and Zach's tubas, Ronnie's bassoon, rest of the trumpets, Penny's flute, Clyde's tuba, and the rest of the percussion with one of the drums exploding, and blasts shooting out of the chimes.

"This is the most insane orchestra ever!" Lynn exclaimed.

After they played the final notes, the audience cheered. After the show everyone had changed into their normal clothes.

"Well, that was weird." Unikitty commented.

"Something weird is going on in this part-time job." Dipper agreed.

Just then, Lawrence came through the door with envelopes.

"Okay, guys here are you checks." He said as he handed them out.

"Wait; hold on, why were our instruments exploding during the show?" Kick asked.

"Well, that wasn't supposed to happen, but I'll tell you next time. Now go on." He said as everyone left. "You'll know soon."