"Towards the latter half of the night, it got really bad. He started yelling racial slurs," Anderson, an adult film actress, tells ABC News. "But it wasn't until he put his hands around my neck that I really thought to myself, you have gotten yourself in a bad, bad situation."
Sheen, 45, was reportedly found naked and intoxicated in the trashed New York hotel suite and taken to the hospital for the day. He later referred to the incident last month as "one bad night" blown out of proportion by the media.
But Anderson says Sheen was violent and abusive at the Plaza Hotel.
"It's not right to hurt people," she says. "It's not right to scare people. It's not right to carry on with such disregard for the people around you."
Her interviews air on Good Morning America and Nightline on Monday.