House tells the story behind his injured leg to a group of medical students.
Season 1 Episode 21 “Three Stories“
House’s ex Stacy Warner asks him to treat her husband. House takes over a diagnostics class for a day and presents the class with three case studies of leg pain. As House tells his story and the class gradually fills up with listeners, the class learns a lot about how to be better doctors, and Chase, Foreman and Cameron learn some important details of House’s past.