It takes a while to register that some of the clicking and snapping sounds aren't coming from under his feet. He looks up sharply. "What do -"

His voice, and his rage, falters for a moment. It's Doctor (what's his name who was it before Alphys must have mentioned it so why can't I remember -) It's the former Royal Scientist. But there's something off about him now, and for whatever reason, it reminds Mettaton of flickering screens and whirring fans and cold.

In a slightly more subdued tone, he finishes, "...what do you want?"