Complex sentence: He is stopped at the last second by Homer, who angrily resolves to jump the gorge himself to show Bart what it is like to see a family member needlessly risk their life for no reason.
Split into simpler sentences: He is stopped at the last second by Homer. Homer angrily resolves to jump the gorge himself to show Bart what it is like to see a family member needlessly risking their life for no reason.