"An unexpected delay in the playing of the national anthem during the Boston Red Sox opener at Fenway Park on Tuesday contributed to the unorthodox maneuver by a Vermont Air National Guard pilot during a flyover moments later.
The resulting spectacle -- one F-16 fighter jet looping over and then under the other three to find its place in the traditional V-formation -- ended in the pilot's grounding this week, which in turn prompted a flurry of media attention."
rest of story, which includes a link to a video of the actual flyover as it happened...
http://www.burlingtonfreepress.com/apps/pbcs.dll/article?AID=/20080412/NEWS01/804120314/1009