JASDF F-15J sheds parts at the Tsuiki airshow

ASDF jet loses tail piece during aviation show
http://mdn.mainichi.jp/mdnnews/news/20091130p2a00m0na013000c.html

Video
http://www.alert5.com/2009/11/youtube-parts-break-off-from-f-15j.html

Flutter? I don’t see any hard evidence directed toward flutter yet. However right now my seat-of-the-pants guess would be flutter.