"It's you whose the traitor!" Lumpy Space Princess exclaims, pointing an angry finger at Finn. "You're probably mad that Jake died, so you're taking it out on us!"
"You're just made it wasn't about you! You're the traitor!"
"I am not!"
"Yes you are! Lumpy-space-traitor-princess!"
"I AM NOOOO..." Suddenly, LSP coughs. She tries to breathe, but there doesn't seem to be enough oxygen.
"Don't fake being sick," Finn says, "that won't work!" But then he tries breathing in himself, and he realizes that LSP hasn't just been playing sick...
"It's really not... you is it?" He mouthes, coughing again.
"I told you it's not me!"
Finn feels himself getting dizzy. Suddenly, there is a tingling sensation all over his skin, as if the air itself is vibrating.
"B... bubble?"
The feeling intensifies. Or perhaps it is just his dulled mind...
"Not bubble anymore," comes a hiss, "it is AIR. The first thing I did after you broke out was pop myself. I popped MYSELF." And the vibration resumed, and Finn realized that it was laughing, the air was laughing...
"Why?" LSP demands. "Why would do you this?"
"Why? Well, because in the alternate world, I WAS A PSYCHOPATH. I AM A PSYCHOPATH. THAT IS ME. BUBBLE THE PSYCHOPATH. MUHAHAHAHAHAHAhahahahahahahahahahaaaaaaa"
"I'm not going to notice... anything... ever.... anymore..." Finn murmurs, or perhaps he's not strong enough anymore to do even that. The air is leaving, and leaving him to suffocate.