The gang went for pizza. Shaggy says they wouldn't be investigating the case of M. Valdemar without him, referring to Poe's The Facts in the Case of M. Valdemar.
Like the protagonist in Poe's The Raven, Shaggy takes the bird's repeated "Nevermore" as a serious, oracular answer to his questions.
The second story with yucks aplenty quoth Poe's "Raven." This little pastiche had The Simpsons to worry about as competition, but it ably carves its own jokes, and Peterson adds plausibility to the tale with Shaggy being the subject of the bird fright. Shaggy exhibits quite a bit of depth in the scant pages, and while the story has a lot of heart, the Valentine theme seems forced.