Kate Winslet thought she knew her way around water after shooting "Titanic."

The actress had spent hours in chilly water while shooting scenes for the Oscar-winning film. So she wasn't concerned about doing a scene in "Eternal Sunshine of the Spotless Mind" in which she and co-star Jim Carrey sit in an oversize kitchen sink.

"Guys, don't talk to me about how long we have to be in water. Hello, been there, done that. I wasn't remotely fazed by it," she told reporters recently, according to AP Radio.

But the water was hot, and after about three hours, Winslet felt light-headed. "I got out . . . and I was like, 'Can I have some water,' and I fainted."

In the film, Winslet and Carrey's characters have their memories erased. Winslet said there's nothing she'd like to forget.