Original: In the second part, which parodies the Twilight Zone episode "It's a Good Life", Bart is omnipotent, and turns Homer into a jack-in-the-box, resulting in the two spending more time together.
Simplified: In the second part, "The Bart Zone", Bart has omnipotent powers, and turns Homer into a jack-in-the-box, resulting in the two spending more time together. The part was a parody of The Twilight Zone episode "It's a Good Life".