By Larry Fine KANSAS CITY Missouri - Madison Bumgarner had his fun, while the Royals vowed to bounce back after the San Francisco Giants brought Kansas City's perfect postseason to an emphatic end with a 7-1 win in Tuesday's World Series opener. Giants ace Bumgarner delivered a dominating seven innings of work and Hunter Pence slammed a two-run homer in the first inning that pushed the Royals into an early hole they were unable to claw out of at their Kauffman Stadium home. "(Bumgarner) was on top of his game," Giants manager Bruce Bochy told reporters. ...