They walk and talk along the way, Papyrus handling all of the walking and talking. He rambles words directed to Reira, an off-the-cuff and unplanned monologue of various worries that she presumably can't hear, being unconscious.

"--and besides, you were right about passing notes. Communication has been terrible, even with those radios, all of you got caught, none of us were around to help, Sans was too busy to jump in the fray - does anyone else teleport? I don't think so, I should ask around... Not that he should, he... hmm?"

And he notices the slight movement and sounds, as if in response to his talking, and slows to check on her.

"Hey, are you waking up? Phew! I mean, I knew it wouldn't take you long!!" He'd hoped that, at least.