Wagga Wagga Fireworks

Today was the last day of the Wagga Wagga Show and what better way to finish it off then with a fireworks display. It is the first time I've attempted to photograph a fireworks display and I must say, I've surprised myself with the end result! However any tips on how to photograph such displays would greatly be appreciated!
I was up on the hill which overlooks the Wagga Showground and I've tried to frame this shot between the trees....with some success.
What do you think of my fireworks photograph?