The short is about Stan, Kyle, and Kenny demonstrating how to make a Jack-o-lantern that looks like Lou Diamond Phillips. They are also arguing with Cartman, who is in the background eating a whole bag of candy cones.
How it was lost
Originally, it was available to download through a small 50 KB file called "SouthPark.mcs", and was made with a obscure tool called Media Conveyor, which, at the time was a rival to the form of Macromedia Flash. It was chosen because it was able to recreate the South Park art style with small downloads, which was important at the time because back then, the average consumer had low bandwidth. Plus, it worked with a cache system. This means that you could make a model once and save it to use for later. Macromedia Flash became the mainstay animation software, leading Comedy Central to pull the short and replace it with a comic following the exact same story, and the short was presumed to be lost forever.
Recently, various South Park fan forums across the web found out about the short and proceeded to look for it. In October 2015, a Youtube channel going by the name of Mannis found this short, and uploaded to his channel.
Kenny accidentally impales himself with a knife he was using to carve a Jack-o-lantern, though the trademark phrases from Stan and Kyle did not follow suit.
- A Mother's Courage (YouTube)