I agree with Dennis about the sound effects painting a good picture on this one and I had thought of Sue's ending as well.  However, I had thought I had heard that Satanists (or whatever they may be called) attended a Black Mass, so I was surprised by the idea that Mass was a bad word (especially when discussing the body's resistance to being accelerated by a force and the strength of its mutual gravitational attraction with other bodies - physics).

This was an okay episode, but not the best.