A good premise for an interesting psychological horror but it doesn't really dwell on the threat or pay off. Bullock leads a strong cast with a great performance as an expectant mother with attachment issues, but the formulaic plot with the generic multicultural cast of survivors being picked off one by one makes it rather predictable. The trauma of an unstoppable invisible force isn't really looked, the inclusions of the possessed humans felt unnecessary at and the time jump removes any sense of tension or suspense, but does allow for some beautiful scenery. The ending was ok if a bit too convenient.