Mettaton continues chuckling to himself, wondering how long it will be until Newt lowers his guard so he can throw another snowball at him when suddenly there's a loud splat! against his shoulder.

The robot turns around and steps up from his hiding place, gasping in mock offense.

"These shoulder blades are Gucci!"

This is a lie since they were built by Alphys, but it gets the point across as he says it emphatically and packs up another snowball. He launches it at Newt at high speed, this time opting out of hiding behind his little snowbank.