Stupidstuff.html is a file which was born inside of a computer. It grew up in different harddrives, during it's stay in some it was next to some fat people porn. This lead to his hate toward overweights, i.e people like king harkinian and Fat Mario.
Ganon's pub incident
During his stay in Ganon's pub he accidentaly harassed five young koopas this lead to Blue Stone Harkinian VII attacking him with his cereal. Stupidstuff.html survived that incident but it fueled his hate even more for fat people, specifically for King Harkinian. What Stupidstuff.html didn't know was that Blue Stone Harkinian VII has no relation to King Harkinian.
Stupidstuff.html was shot by King Harkinian by the king's Dinner Blaster