“Morty, sit here. Summer, you sit here. Now, listen—I know the two of you are very different from each other in a lot of ways, but you have to understand that as far as Grandpa's concerned, you're both pieces of shit! Yeah. I can prove it mathematically. Actually, l-l-let me grab my whiteboard. This…”
— Matt Roller, Justin Roiland, Dan Harmon, Rick Sanchez (voice), Justin Roiland, imdb.com