Fireworks are reactions that happen in the sky. The comparison is fireworks and the person the song is about are both special, unique, and beautiful, but if mis treated both can hurt you. A firework can explode, and so can a person's emotions.
Sparklers would be a cool example of life for this project. Again, an awesome mood is set by it's own light. And everything els could be edited to be dimmer to draw out the rich color and light of the sparkler.