Grey Matter, Grandpa Max and others in “Unfinished Business”

Yo, Earth to Grandpa! Come in, Grandpa!

Ben?

If you're checking up on us, don't bother! We're totally handling things up here. We don't need your help.

Wrong! When you hear what I'm about to say, you're gonna wish you had my alien muscle with you.

Since when is Grey Matter muscle?