With five games to go in his 67th season, Vin Scully said, "Wow." With four games to go, he said, "Whoa."He has seen Bobby Thomson's home run and Don Drysdale's shutout streak and then Orel Hershiser's. His amazement threshold is high.Yet Scully has kept both feet in the broadcast booth until it all ends in San Francisco next Sunday, and his eyes look straight ahead and down at the only thing that matters.