Villainous Treachery by Kevin MacLeod
The melody for this piece is in the bass keys, while the high notes play a headache-splitting constant rhythm. At the one-minute mark the high-pitched notes drop several octaves to play a crunched staccato before returning to the previous theme. The last thirty seconds feature drawn out chords, and the tempo slows dramatically, ending with frustrated trills in both registers, signaling the demise of the villain.
Brilliant! Does what it says on the tin...it's villainous, and evokes sheer treachery.