So I remember watching this movie about 8-10 years ago or so maybe 2006-2008. It was about a group of people who had banded together after a town was evacuated. There was music that was coming from the sky that was slowly driving them crazy. They’re basically walking to an unknown destination and at one point one of them actually goes crazy, tears off another one of theirs arm as another girl watches through binoculars and runs off into the forest. At the end of the film they end up at this eerie abandoned theatre where there is a movie playing and a guy standing in the back. The movie ends after that.