"My name is Finn" he replied as he sat up. "But who the plop are you?"

"I'm Fionna the Human." she said, proud of her name. "And this here-" she then pats her shirt pocket - "is Cake. CAKE, WAKE UP, YOU SLEEPY HEAD!"

Cake the Cat, who was shrunken to a miniature size, was napping in Fionna's pocket. "If this isn't important, I'm gonna claw your eyes out..."

The cat climbed out of the pocket and grows to her regular size. She opens her eyes, and the first thing she spots is Princess Bubblegum. "PRINCE GUMBALL?" she screams "WHAT DID YOU DO TO YOURSELF?"

"Cake, shh! That's not Gumball, stupid. That's... uh..."

"-Princess Bubblegum" Finn interrupts, slightly flustered when saying her name. "That's Princess Bubblegum, ruler of the Candy Kingdom."

"And, who are you?" Cake says, obviously suspicious

"Finn. Finn the Human"

"FINN THE HUMAN?" Cake screeches again. "FI, FI, THERE'S ANOTHER HUMAN. AND HE'S A BOY. AND HE- Oh my glob, he looks exactly like you!"

Fionna rolled her eyes. "Cake... shush. Let us sort this out." Looking at Finn, she says "Look, I dunno what the heck is happening, but can we please get an explanation?"

Both Finn and Fionna turned to Princess Bubblegum for an answer. "I think I know what happened here... you see, if this 'Prince Gumball' guy was doing the same exact experiment at the same exact time, well, I suppose the overload of energy created a black hole leading from one universe to the next"

"Peebs" Finn says "Is there any way to fix this?"

"Well, I'm not that sure, but I guess I could try to-" Suddenly, the doors burst open.

"Hey, party people! Rainicorn n' I were just-" Jake the Dog stops in mid-sentence as his mouth gaps open, revealing his pre-chewed taco. He drops his taco, and screeches "DUDE... WHAT THE JUNK DID YOU DO WHEN I WAS GONE?"

"I dunno, Jake! We're just chillin' and experimentin', and the next thing you know, these gender-swapped versions of us comes outta nowhere!"

Jake suddenly spots Cake, and gasps.

"I-It's me!"

Cake jumps from her spot and eyes him carefully.

"You can't be me. I'm me."

"Well, only one thing will settle this."

Slowly, Jake lifts up his right hand. Much to his amazement, Cake did the exact same thing. They started doing ridiculous gestures and dances at the same time, as if they were looking in the mirror.

"This is scary, dude." Jake slowly crawls back to Finn.