This isn't really dog but anyway:
My cat was outside one night when there was a rugby match on with fireworks. She got totally spooked and ran out onto the road and was hit by a car, crushing her leg beyond repair, leaving her tail hanging by a thread and causing her to lose all the claws in one paw. She dragged herself back to our back door and sat their quietly for about an hour. My brother went out once to check if she wanted to come in but he didn't notice she was injured. Then, later, my brother picked her up and noticed her leg and dropped her. We rang the vet and he went back to the surgery (it was about 9.30pm). We didn't have a cat cage so she was sitting on my brother's lap all the way to the vet.
The vet had a look and he said he'd have to ampute the leg. She was kept in there for a few days and when we went to get her she had 23 stiches in her leg and 3 in her tail. We brought her home (in my dolls bed) and first thing she did when we put her down was limp up to my brothers bedroom and try and jump on the bed (one of her haunts).
Now, more than a year on, she is fine and gets around very quickly and can jump quite high but we think she'll probably get arthritis in her remaining back leg.
Just thought I'd share a fireworks experience
Naomi