[fabsroman]

Don't slam the door so much that they get hurt. They will see the door coming at them and probably stop in their tracks.

Have you worked on the sit command and will it hold the sit command for any length of time? If so, put the dog in the sit command and open the door. Then give him the release command after letting him wait a couple of seconds. Increase the length of the wait as the dog holds the command longer and longer. If the dog breaks the command early, you just close the door on it without breaking its nose. I have always used this on my dog, Nitro, until I put hardwood floors in the house. He gets so excited when I give him the command to go outside that he was tearing up the floors. So, I let him into the garage without giving him any commands, but I make him sit before I open the garage. Then I open the garage and walk out. After I am about 10 yards outside, I give him the release command (i.e., "Okay") and he is off and running without doing any damage to the concrete.