In addition to urinating on Efron (his character has an unfortunate encounter with a jellyfish), she also participates in a couple of wild sex scenes, including one in which she pantomimes performing oral sex on an inmate (played by John Cusack).
The urination scene, though, has emerged as the biggest story to come out of the movie. Daniels explained the shooting to GQ: “First of all, it was really hard to shoot. It was the third day. The first scene we shot was the sex scene with John [Cusack and Kidman]. I like to get that right out of the way. The second day was the telepathic sex scene in the prison. And the third day of shooting was the piss scene.”