Generate a high arousal and low valence music piece by creating a composition that is somber and haunting, with a sense of foreboding and melancholy. The music should evoke feelings of sadness, despair, and a sense of unease, while maintaining a fast tempo and intensity. This can be achieved by using minor chords, dissonant harmonies, and a sense of urgency in the rhythm. Remember to keep the tempo fast and dynamic to evoke a sense of heightened emotion and intensity.