Saw this in the voting booth and was intrigued. Thought at first you had taken a shot of a sparkler ... in which case given the perspective, I would have given you that extra half-mark for risking hair and limb ;) .
The trailers of the fireworks are what really caught my eye. The pattern that emerged is ... cool. I like your vantage point and set-up for the shot, as I think that your perspective is a strong feature of the composition. The balance is great. Nice work.