[Papyrus makes a face, briefly, as his brother joins him in sitting on the ground-ish surface. He'd thought to try kindling childhood thoughts by changing the height difference between them, and this sets them back to him being taller... But his expression washes away in favor of surprise with Sans's specifics.]

The Royal Scientist? Not just a bunch of scientists?? You were always off with... them...

[It's not the same as the disorientation during the island-bound amnesia, all open mouth, words come out and surprise you. With this, he feels something of the shape of them, half-remembered fragments that didn't do him any good to dwell on, without the world meeting him there. He's hesitating more from habit than surprise at his own words.]

...I, uh. I don't remember doing much science.