[Papyrus is exhausted, which says a lot. Between the preparations to travel the cave and face those alarming shadows, the emotional turmoil from those waves of despair, and that sudden scare with the relic? The flood of memories, including those last minutes where the surface had begun splintering and dissolving around him, until Greg the Universe personally invited him to go save it...? He's needed the trip to catch his (mostly metaphorical) breath.
Now they're on the moon base, and now he knows why he's never managed to remember anything about it. His eyesockets dart about as he takes in the sights, and so he misses any warning before Sans launches at him.]
Ooof!
[It's a good thing there's levitation involved, or that might've knocked him off his feet. But Sans is nowhere as heavy as Undyne, and Papyrus manages to catch himself, then grin and return the hug.]
Nyeh heh heh, it's good to see you too, Sans! Can you believe it?? I remember everything.
it's Time
Now they're on the moon base, and now he knows why he's never managed to remember anything about it. His eyesockets dart about as he takes in the sights, and so he misses any warning before Sans launches at him.]
Ooof!
[It's a good thing there's levitation involved, or that might've knocked him off his feet. But Sans is nowhere as heavy as Undyne, and Papyrus manages to catch himself, then grin and return the hug.]
Nyeh heh heh, it's good to see you too, Sans! Can you believe it?? I remember everything.