52 Films/52 Weeks: Hush
A group of people are trapped underneath a crawl space at a school gymnasium. There is a terrifying noise that comes from above. A monster of some sort is trying to get at them. Their only defence is to stay quiet, but for how long and to what end. As time passes the sounds and scratching get louder and louder. eventually someone will crack and when that happens the monster will breakthrough and kill the people.