We see the Siskel and Elbert film sign, before the Simpsons sit in their seats. The light dims, and then brightens a bit. Then we cut to the movie screen, then a white screen with "THX" on it (not the same as the other logos) appears, with "SOUND SYSTEM" and "THE AUDIENCE IS LISTENING" under it. The sound shakes the theater/cinema, breaking many peoples' glasses and teeth, an exit sign, and even a head with blood in a brief amount of time. We cut to the same film screen, with the logo on it. The audience whoops, and the screen fades out. Grandpa finally yells "Turn it up!" twice.
- As a THX intro, the electric blue frame from the Broadway trailer makes a cameo at the beginning.