THX is a real-life sound system used for several movies. The noise is so loud it caused the room to shake, the fire exit sign to be smashed and a person's head to explode. When it was over, people were cheering, unlike Grandpa, who asked to turn it up.
- The deep note is the exact same deep note in the real logo.
- THX executives liked the scene so much, that it was re-animated in widescreen and used as an official THX trailer in movie theatres.