Oh god, he's not saying anything. He's just staring and he's not saying anything and this was such a stupid idea, Mettaton probably already knows everything there is to know about dancing, and if he didn't he could have just looked it up or gotten it from the closet himself, and now Sans actually is starting to shrink into his hoodie because this was such a dumb move and he'd like to just disappear now thank you.

The Mettaton actually speaks and Sans looks up at him. He must have misheard.

Sweet?

"oh."

That's not annoyed disbelief on his face, that's...awe?

Oh.

"ah. heh. well, i'm glad you like it."

The grin is back on his face. Okay. Okay, good, Mettaton actually liked it. Hell, he loves it. Sans did alright.

He actually chuckles at the last part.

"pfft, only if you stick it somewhere weird."