be eyes. During the shoot, Harris suffered from depression, and believed that her co-stars did not take the film as seriously as she did. At times, she would cry in her makeup chair prior to the day's shoot. The other actors remember her as being distant, not a part of their socializing and joking, and Harris did not speak to Bloom during filming, which puzzled Bloom. Afterward, Harris told Bloom that the lack of interaction had helped her build her own performance and the two women reconciled. Harris incorporated her own depression into her performance. Wise heightened the sense of character conflict by having the characters "step on one another's lines", allowing one character to begin talking before the other had finished. On occasion, the characters simply talk at the same time. To enhance the actors' performances during scenes in which they react to off-stage voices or sounds, Wise and his sound editors created a "pre-scored" soundtrack of voices and noises. These were played back during filming, and Wise says they greatly enhanced the acting performances. Although some sounds were replaced during post-production, the "pre-scored" sounds were left on the soundtrack just as the actors heard them. Sound editors collected and created sounds in an empty manor house for a week to create the pre-score. Some of the sounds are very low in the bass range, which can cause physical sensations at high volume. Effects and editing The film contains a number of special effects, many of which were achieved in ways not immediately obvious to the viewer. In one scene, a supernatural force pushes against a large parlour door, bending it inward repeatedly. Though the door appears to some viewers to have been made of latex, it was in fact made of laminated wood; the strange buckling was simply the result of a strong crew member pushing a piece of timber hard against it. Two physical effects were used to make the spiral staircase in the library appear frightening. In one scene, the camera appears to ascend the staircase at a rapid rate. Wise achieved this effect by using the staircase's handrail as a makeshift dolly track: a camera was attached to the rail and then slowly allowed to slide down, with the speed of the descent controlled by a wire attached to the camera. The sequence was then reversed and run at high speed, which gave the final