Jerry: We did it...
Testicle Monster A: Uh-huh, no motha- no, Earth, dude, I'm talking 'bout, yeah, with the dinosaurs. No, if you've get to the dolphin people, you've gone too far. Alright man, I'll talk to you later, okay.  You know what they do with 3rd dimensional life forms in time prison? Same thing they do in every other prison, only forever.
Morty: Why are you doing this?
Testicle Monster A: You think I wanna be an omniscient immortal being transcending time and space my whole life? I got ambitions man, bringin' you guys in is my ticket up.
Rick: What if I told you there's a huge ticket up right behind you?
Testicle Monster A: You really think I'm that stupid?
Rick: Alright, hear me out on this. You're immortal, right, which means your life is infinite. Well in that case there's 100% chance that you'll eventually do everything, including turning around to look behind you.