i thought that what mainly intensified this movie was the music. It really added to the creepy and suspenseful factors of what was happening. Another part being the complete abandonment in the setting. There was nothing near the hotel, making the escape hard, especially with all the snow. I thought that the bringing in of the past hotel keeper was cool because it helped Jack realize that he was crazy and maybe now he is too. Their child had a gift and he was able to speak to the dead girls in a way and his little friend, which sent messages out that they were in danger. The camera focused a lot on  the emotions of the actors more than their actions when they were in trouble and i think that helped to scare me as a part of the audience.