We're always on the lookout for ways to expose Talos to new and unusual sights and sounds. When we were at the Christmas Tree farm we had the chance to get our Christmas tree bundled. The bundler is loud and big. And there was plenty of room to move away if Talos showed any fear or avoidance of the crazy contraption.
The key to introducing your dog to something novel is to do it incrementally, to do it systematically, and to always (and I mean always!) go at your dog's pace. If you see signs of anxiety (tucked tail, ears back, lip licking, hiding behind your legs), STOP! Move further away, speak calmly and quietly to your dog, and try to feed some extra yummy treats. If your dog isn't eating those delicious treats, you know he's still too stressed. Move even farther away. Keep moving away until the dog's body language is more relaxed and until he's able to take treats.
What NOT to do: Don't reprimand your dog, don't boss your dog, don't pull your dog closer, don't stay there and expect your dog to get used to it. That's not fair to the dog and proves to the dog that you're not on the same team.
Take a look at what a really good relationship (developed through clicker training) can get you…a dog who's a little uncertain, but who trusts that everything's ok as long as he's with you.