[Papyrus is going to vigorously scarf them down in like two bites each in an effort to get the heat of an entire bottle of chili sauce out of his mouth.

It's lessening the agony somewhat, and he actually calms down and lies back on the floor, fully prone.]

Your first mistake is underestimating me, Papyrus, the master of japes! [What is a prank but a slightly more mischievous puzzle?] Alphys is pretty talented, yes, but you will find my retaliation... alarming!

[Is this foreshadowing? It's foreshadowing.]