My Lab does a good imitation of a crazy 100 pound Rottweiler when the doorbell rings. She sounds like Cujo. Growls, snarls, great big roaring barks.
Of course, once you open the door all she wants to do is fawn on the caller, try to kiss him, and grin all over her cute little face.
Jake's favorite day was Halloween when all the neighborhood kids would come to the door for treats. One ring of the doorbell and he would let out a big "woof." He also liked to lean forward and sniff the contents of each bag of treats...