 SPOILER: The endings of the US and UK versions differ. In the end, Sarah  wakes up at the bottom of the cave, crawls out, and makes her way back to the  car. When she is driving away, she pulls over and vomits, and when she leans  back into the car, she is startled by the ghost of Juno sitting in the  passenger seat. The US version cuts to the credits here. In the UK version,  this apparition causes Sarah to wake up for real at the bottom of the cave,  revealing her escape to be just a dream. She then has a vision of her  daughters birthday cake, which we see is just her torch. The camera backs  out, and the movie ends. This ending was considered "too dark" for US  audiences.