BOSTON -- If Tuesday's fly-over during the opening day ceremonies at Fenway Park looked unusual to thousands of fans and television viewers, it looked "irregular" to officials with the Vermont Air National Guard.

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Fenway Fly-Over Pilot Grounded

The pilot of one of the four F-16 fighter planes that flew over the ballpark has been grounded, Guard spokesman Lt. Col. Lloyd Goodrow said Thursday.

Spectators saw one of the four jets fly up, over and below the other three jets in the formation that sped through the sky over Boston following the National Anthem.

Goodrow said the pilot was trying to slow down to keep in formation with the other planes when what he called an "irregular maneuver" was made.

While the move, Goodrow said, is authorized to assist in bringing jets into their "V" formation at higher altitude, it is not usually done at the low altitude the planes were flying.

"When the pilot landed, believe me there was a discussion. It never should have happened, and the pilot knew it right off the bat," Goodrow said. "Flight safety is our primary concern."

The pilot has been "grounded for remedial training."

The Vermont Air National Guard has been doing fly-overs at Fenway Park for the past several years.