 He based it on a real-life experience, in which he, as a child, accidentally launched a model rocket into a window in his house.A scene from this subplot was removed from the episode following the September 11 attacks.The scene would show a man named Hassan Jay Salam being arrested by policemen (who tells them to call his cousin Casey Kasem), who think the rocket Bart and Homer launched was launched by him (The rocket bears the abbreviation HJS, which stands for Homer J Simpson).