I have been led to believe that calling 911 is a joke! If the Devil is doing it I may need to check this out.
Back in the days before widespread cellular adoption, it seems evil had to resort to other methods of communication in an emergency. I really would like an MTV-style music video for this song, as it'd be fun to see these two wielding their spiritual gun and chasing down the demonic.
This cover is great:
Here is a more highly produced version:
Live:
Other musicians have also used this theme: