Create an emotionally charged music composition that evokes a sense of urgency and anticipation. Craft a piece that captures a feeling of unease and nervous energy through dynamic rhythms and dissonant harmonies. The music should build tension slowly, culminating in a climax that leaves listeners on the edge of their seats. Incorporate abrupt shifts in tempo and volume to amplify the emotional intensity of the composition. Embrace the dark and suspenseful elements of the low valence and high arousal levels to create a captivating musical experience.