Sans hesitates again. Oh, yeah. He realizes better... say something. A warning. Not for his sake, but Gaster's.

"There's this guy, decided rampaging around the castle and trying to kill people was a good idea. His name is Croc. I dunno if he's still pissed."

Which means it COULD happen again, but Sans wasn't sure.

He looks back down at the guitar. After a little more strumming at picking at nothing in particular, a tune finally comes out. He half hums, half mumble-sings the words. A few notes are stumbled through, and there's some awkward places, but it's not bad. It's pretty good for a guy who could only be taught so much through a door.

"It's an old human song."