I thinkit would be wise to try not to "coddle" him when he is scared like that. They pick up on your anxierty and if you baby him when he acts like that then he will reallythink there is something to be afraid of. But if you ignore his behavior then he might get the hint that the situation is ok and he may feel more confident.
I speak from experience!! Oliver was my first dog that I owned by myself (I had a dog growing up). The trainer told me that I coddled him too much in these situations because I didn't know. Now I have a "scaredy-cat" dog! I have learned a lot of things that I would do differently when I get another puppy...someday!
Holly, Oliver, Rosalita, and Scarlett