It's a very cheap movie but the acting isn't bad like other people are saying. The characters feel like they're sleeping walking through this. Specifically Melanie Lynskey. Seemed like she didn't want to be in this. Maybe she was doing a friend a favor. Performance wise she was the worst. The characters are also dumb. There was never a sense of urgency. Despite there being a guy on the roof, they could have made a run for it in different directions.