I recall Calvin mentioned the Noodle Incident but I don't think Watterson never went into detail and Calvin never fully confessed.
Apparently pasta was the thing in the late-80s / mid-90s .
Other pasta related affairs around that same era include
Guns N' Roses 1993 album of cover songs entitled "The Spaghetti Incident", which, according to wilkipedia, got its name from an incident wherein the band's orginal drummer wrecked the band's apartment in search for his lost "spaghetti"- a term he used for herion.
And then there is the "Linguini Incident", a movie released in 1991 starring Rosanna Arquette and David Bowie about two disgruntled restaurant employees (David Bowie, Rosanna Arquette) who decide to rob their employers (source: IMDB).
New tagline...
My favorite throwaway was the title of Calvin's favorite bedtime stories - Hamster Huey And The Gooey Kablooey.
In the last panel of that strip, after demanding that the story be read to him AGAIN, Calvin says "Wow, the story was different that time!", to which Hobbes responds "Do you think the townsfolk will ever find Hamster Huey's head?"
That's great! I'll have to use that. Good ol' Calvin and Hobbs!