There are no music terms used in the Little Fugue in g minor (BWV 578).

Bach Alive Toccata & Fugue in D Minor, BWV 565 (for organ).

1. Fantasia and Fugue (for organ) BWV 561.
2. St. Matthew Passion BWV 244

The "Toccata and Fugue in D minor" is probably one of Johann Sebastian Bach's most easily identifiable pieces. No self respecting 1930's horror movie would be complete without at least a few bars of it somewhere during the movie.

Bach actually wrote two toccata-and-fugue pairs in D minor, both in 1708. The most famous one (appeared in the original Fantasia movie, and often used as a stock piece of generic "scary music") is BWV 565. The other, sometimes called the "Dorian" toccata and fugue, is BWV 538. Check the number if you're looking to buy a recording!