July 4th Fireworks

We went to a friend's house the other night to watch the fireworks. This is my first experience with trying to photograph fireworks. And this is also really my first time to try to take pictures of stuff at night. I'm pretty happy with how they turned out. Maybe I'll stop taking pictures of kids and families and just concentrate on fireworks. There's a huge market for that, right? I could make money at that, couldn't I?