Chen wanted to sigh at all of this stupidity. He decided to walk forward towards where the weird monster(?) had run off to, they likely knew where Frisk was. He took out a notepad and began writing down random bits of information about the environment and various "important" things. He had to keep up a cover after all. Chen looked at Papyrus and smiled. 

"I love bad puzzles!"[b] [color=Red]'I hate puzzles. Almost as much as I hate you, you moron. I can't wait to kill you.'[/color][/b] Chen continued to walk forwards and tripped over a joke book that Sans had thrown. A snarl crossed his face for a split second, quickly replaced by a look of confusion. "Wait, what?" He got up and saw that the ground was covered in joke books and quantum physics books.

"Are these real? Where did all of these joke books come from... oh, right." Chen looked at Sans with a smile. "You should really be more careful where you throw these mister. Someone could get really hurt."  He smiled as he said that, then continued to walk forwards.