PORTLAND, Maine — A Maine high school senior says he was denied his diploma because he bowed during graduation and blew a kiss to his mother.

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Justin Denney was about to receive his Bonny Eagle High School diploma on Friday when he pointed at friends and relatives.

Schools Superintendent Suzanne Lukas ordered him back to his seat. She told the Portland Press Herald newspaper she was enforcing behavior rules.

Justin's mother, Mary Denney, said her son's showboating didn't break any rules. She told WMTW-TV "a kiss to your mom is not misbehavior." She is seeking an apology — and a diploma for her son.

The commencement at the Cumberland County Civic Center also was disrupted when a giant inflatable rubber duck and beach balls were thrown. One student was ejected.

Some parents want a review of commencement policies.