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Angie Everhart just told a stunning story on TMZ Live ... she says Harvey Weinstein broke into the room where she was sleeping on a yacht, held her at bay and masturbated ... she told everyone about it afterward, but no one cared.

Angie says the incident happened more than 10 years ago on a yacht during the Venice Film Festival (she mistakenly said Cannes). She says she had just arrived from the United States, was jetlagged and went to a cabin and fell asleep. The next thing she knew, Weinstein was over her, blocking the door and pleasuring himself.