Metallica's Hammett, Green Day's Armstrong Wipe Out

Metallica guitarist Kirk Hammett was injured last week when he was stabbed by his surfboard while being tossed by a wave, according to a special report from the artist on the band's official Web site.

Metallica guitarist Kirk Hammett was injured last week when he was stabbed by his surfboard while being tossed by a wave, according to a special report from the artist on the band's official Web site. The surfboard injury resulted in six stitches under Hammett's armpit, with the gouging rendering him unable to play guitar for "a week or two."

In the interim, Hammett is offering his vocal, percussion, tamborine, and piano talents to the recording of Metallica's upcoming Elektra album, which is currently in progress in the band's Bay Area studio with producer Bob Rock.

Just days prior to Hammett's injury, Green Day frontman Billie Joe Armstrong sustained a minor head injury while surfing at Newport Beach, Calif. According to the GreendayUK.com fan site, Armstrong suffered a cut but was not seriously hurt.

In other Metallica news, the band has donated a previously unreleased version of its early favorite "Hit the Lights" to the forthcoming nine-CD box set "Metal Blade Records 20th Anniversary," due Oct. 22. The 140 track retrospective also boasts unreleased material from heavy hitters such as Gwar, Fate's Warning, Armored Saint, and King's X.