A/N: I'm new to this, so I'm still working out how to post it , ect, please bare with me, I'm only going to be posting the summery in this one just in case I do it wrong or something.
The human falls down into the underground again, but papyrus realizes that sans isn't his normal self, he isn't telling any jokes, worried papyrus keeps trying to figure out what's wrong with him only to find out he did something stupid.