My GSD (who looks remarkably like Buddy) couldn't care less about fireworks, thunder, gunshots, etc. Very little phases her.

However, my wife and I are expecting a baby in two weeks so we were practicing setting up the Pack 'N' Play and for some reason that scared the crap out of Gracie. We took it out of the bag and she took off running It was so weird b/c that dog isn't scared of anything. Granted 3 minutes later she sniffed it and all was well, but it was funny nonetheless.