Oscar winner Kate Winslet hates to “burst a bubble,” but this lee Star had to admit to the audience that the iconic door scene in Titanic was filmed in a “waist-high” tank.

“Well, that was a pretty nasty tank,” she began on a recent episode of Josh Horowitz Happy, sad, confused Podcast. “To burst a bubble, it was waist-high, this tank. So at first I periodically thought, “Ugh, can I just go to the bathroom?” and then I got up, walked away from the door, walked to the edge of the tank, which was about 20 feet away, and and I literally had to my Throw your leg over and climb out of the tank and go pee and then come back and crawl to the door again.”

The veteran actress joked: “It’s terrible to admit these things… I’m afraid Leo is kneeling at the bottom of the tank. I shouldn’t say any of this. James Cameron will call me and say, “Why are you telling them all this?”

She added: “The amazing thing about the edges of the tank was that it was an infinity tank, so there was a constant rushing of water and you could hear the constant sound of the water.” In fact, the sound of the running water was so pervasive that Winslet said the last 20 minutes or so of the film were shot entirely in ADR, including the actors’ shaky breathing and Rose’s cries for Jack.

As mentioned in the podcast episode where the Eternal sunshine of the flawless mind The actress discussed her work from Celestial creatures To Sense and Sensibility, Titanic has been much discussed (and memorized, referenced and parodied) over the decades. Particularly controversial is the crashing plot of the popular 1997 epic romantic drama – the final sequence in which Jack (Leonardo DiCaprio) slowly succumbs to the freezing depths of the Atlantic Ocean – whose fate has long been disputed as avoidable (see: Keke Palmer’s point of view).

When Horowitz joked that he wouldn’t rehash that argument, he suggested that DiCaprio had “post-traumatic stress disorder” since he’s been asked repeatedly over the years about his thoughts on the scene, to which Winslet replied, “He probably does.” “I got post-traumatic stress disorder from the whole thing.”