Most ponies aren't used to seeing the dark side of Pinkie Pie. She's Ponyville's resident party pony, after all! She's the mare you go to when you're in need of a smile. For her to lose that charm and energy... well, it's practically unthinkable!
However, not even she is immune to having a Bad Day™, and when a day like that hits, it hits hard. But if she's the pony that's supposed to help ponies smile, who is going to help her smile?
Her husband, of course.
Requested by Perfectly Insane.