My neighbor had fireworks close to my backyard and one (maybe two) of them drops on my roof since I heard the sound. Then I went outside and told them I heard the bump sound from our roof and please move a little far from my backyard. The lady said, sorry , we will watch for it. I am a little bit concern whether it will hurt the roof or not because it's hot stuff. How can I deal with it? Is this kind of action illegal? Any comments are appreciated.