Instead of fireworks, Dominicans celebrate Independence Day with noise. Lots of noise. They take the mufflers off of the few motorcycles that actually have them and tear up and down the street. Or they just blast music at full volume. Hey, it's safer than explosives, and nobody can sleep through this holiday!
There's also dressing up and dancing at Carnaval, but not much happened in my site this year. That's not to say there wasn't any festive spirit. Plenty of people got dressed up anyway.