Batman: Mask of The Phantasm

The opening theme for the movie are accompanied by Ominous Chanting to the tune of Shirley Walker's memorable BTAS theme. The chorus is actually chanting the last names of production team members in Sdrawkcab speech. These members helped Shirley Walker with the final mixing of many of her tracks for the film and the animated series, but were never credited because their contributions were considered too small.

Playing the lyrics backwards, they are clearly saying:
"Tom Milano, Patti Zimmitti, Jean MacCurdy, (Unknown), Hans Zimmer, Mike McCuistion, Eric Radomski, Joel Franklin, Richard Bronskill!"

Example of:
Ominous Latin Chanting