Sans pauses in his movements - not because he's actively intending on stopping with the scratching if it's helpful, but because Papyrus seems even more dejected about this than he'd initially observed. His grin falls to something more neutral. He gives the crystal stubs on last scratch before floating back down to eye level.

"The mirror people like to mess with your reflection, but if we go in together I could fact check it for you," he says. "You know, keep 'em honest."