* HarpoDoesSomethingFunny The legendary scene with Ty and Carl in Ty's "home" was added to the script solely because the writers realized that there wasn't a single scene in the movie that featured Bill Murray and Chevy Chase together and was almost entirely improvised.
* HeyItsThatGuy: ''The'' TedBaxter plays Judge Smails.
** That's Yori from TRON as Lacy Underall.
* RealLifeRelative: Creator/BillMurray and BrianDoyleMurray.
* WhatCouldHaveBeen: Harold Ramis has said that he was told that Rodney Dangerfield was interested in doing the second movie. Dangerfield actually was attached, but was displeased with the script (as many turned out to be). With no suitable rewrites, he backed out.