Back Row Of The 'Beis highlights an interview
with composer John Debney about his work on that Mel Gibson movie.
[composer John Debney] went on to say, "I had all these computers and synthesizers in my studio and the hard drives would go down and the digital picture that lives on the computer with the music would just freeze on his [Satan's] face. Then the volume would go to ten and it would happen all the time.
"The first time it happened, it scared me," Debney said. "Once I got over the initial shock of that, I learned to work around it and learned to reboot the computers and so I would start talking to him.