Homer quits his job and becomes an inventor. Setting up a tinkering shop in the basement, he sets for himself the modest goal of inventing more stuff than the prolific Thomas Edison. Homer comes up with some incredible new inventions, like an electronic hammer, a reclining chair with a built-in toilet, and a rifle that shoots make-up at women's faces. One of his creations, a chair with two extra feet that lets you lean way back, seems to be very popular. When Homer realizes that his six-legged chair was actually already invented by Edison, he takes his trusty electronic hammer and goes to the Edison Museum to smash the original, which is inside a replica of Edison's workshop. While there, Homer realizes that Thomas Edison was also working in the shadow of a great man: Leonardo Da Vinci. Homer feels a deep kinship with Edison and decides not to destroy the six-legged chair. Later, when authorities find the electronic hammer, which Homer forgot, in Edison's workshop, the deceased inventor gets credit for yet another amazing creation. Homer is furious.