Well, there he goes. And, invested at this point—or simply someone else who has an abundance of free time on their hands, paws, whatever—Gilgamesh trails after him and begins to babble the rest of the way.

"He's such a bumbling fool," Gilgamesh complains, "Either half-asleep or half-conscious or otherwise half-present. I've no idea why she places such a degree of faith in him. It's unfair, to the rest of us, working so hard for her benefit, one would think..."

One would think Gilgamesh might notice the trouble brewing all around him, and he doesn't. Not at first. He keeps going on and on, with an almost hilarious lack of tact, about all of Sans' negative aspects, and Gilgamesh blows them so far out of proportion one would think there's not a single good thing about the skeleton.

Then said nightmare bites at his ankle as he passes by and snaps him out of it, sort of.

"Damn!" Gilgamesh lashes out with his tail, but the perpetrator has already melted back into the shadows. "Look what you've gone and done, mongrel! You had better take care of this. Go on, kill it. I'll pass a good word onto our esteemed Warden for your efforts."

...yes, apparently, Gilgamesh was going to make Totally Not Sans do everything.