You need to read the pup's body language and protect her. Introduce everything slowly and watch for her reaction. Negative experiences as a pup can take a long time to reverse. They get stronger as they mature if they are not pushed. If she reacts, then determine whether it was just an initial startling and then she calms down, then she is being exposed without negative reaction.
My trainer has always said that we, the caretakers of our dogs are responsible to protect them as much as we can from negative experiences, no matter the breeding or how tough we think they should be. He should know as he has trained 100's of dogs in his lifetime in Schutzhund.
To answer your question, both, a young dog who is not comfortable with a stimulus will exhibit fear.