Concept: Slimecicle meets Karl and it goes like
Slime: Hello, Karl Jacobs from Every-when!
Someone else: Don't you mean 'everywhere'?
Slime: I definitely do *wink*
Karl: (having a crisis trying to remember who this guy is and if he told him)
Au where Karl time-travels and then he sees Phil, looking the exact same as ever, and it's like the spiderman meme and
Karl: We time traveled to the same time??
Phil: I didn't time travel??
Karl: You didn't?? How are you here??
Phil: I never left??
Karl: YOU'RE IMMORTAL??
Phil: YOU CAN TIME TRAVEL??