[REC] (2007)

"REC" turns on a young TV reporter and her cameraman who cover the night shift at the local fire station. Receiving a call from an old lady trapped in her house, they reach her building to hear horrifying screams -- which begin a long nightmare and a uniquely dramatic TV report.
What it lacks in character development, it more than makes up for in fast paced thrills, shocks and genuine tension. The setting and shaky cam create a claustrophobic atmosphere, held together well by naturalistic performances from the cast.