Unlike Look Before You Sleep, Spike is present with his voice heard only, but not seen in this episode; Twilight had sent Spike to the roof to hold the lightning rod in place, and he later falls off it when the tree crashes into the library. In his brief appearance in "Dragone Baby Gone", his feet have been digitally altered to appear bandaged, possibly as a reference to his fall in this episode.
The episode's musical number is a song Rarity compulsively sings before going to bed named "Art of the Matress" is known to play in this episode, set to the tune of Art of the Dress. It has allegedly been favorably commented on by Daniel Ingram, the composer responsible for Friendship is Magic's songs.
Rarity and Applejack are stranded at Twilight's house during a thunderstorm. Twilight Sparkle learns valuable lessons about friendship and magic.
Description (Unofficial) Edit
A thunderstorm is coming, and so Rarity and Applejack get settled to be stuck in Twilight's house for a sleepover and do some (a bit) stupid random things at the library.