JACK JOLTED BY GRANDKID'S LATEST MESS

Troubled Nicholson kin caged in domestic dispute

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A SHAKEN Jack Nicholson is devastated by the nightmarish news that his grandson has been arrested on domestic violence charges, and now he's doing everything he can to help out in any way possible, sources tell The National ENQUIRER.

According to the police report, Sean Knight Nicholson, 29, who also goes by the name Sean Norfleet, threatened ex-girlfriend Elizabeth Lawlor, 28, saying he'd kill himself if she didn't come see him. When she arrived at his apartment in Los Angeles, an argument ensued, and Sean allegedly grabbed her by the neck and head and threw her into an unidentified hard object.