Homer the Smithers

Mr. Burns' assistant, Waylon Smithers, nearly works himself into a nervous breakdown and is forced to go on a vacation. Fearing that whoever fills in for him in his absence might replace him permanently, Smithers places Homer Simpson in the job, figuring that there's no way the plant's worst employee could possibly be a threat, but when Homer teaches Mr. Burns a lesson in being self-sufficient by punching him, Burns fires both Homer and Smithers.