Saw this before 2011 in a theater. All male actors. In a small town and forest rather than a city. A group of 30 something guys have a reunion or come home for a funeral. They talk about their friend who as a child was very sickly and remember odd happenings. They are in a cabin when things start to go awry. Very long scene concerning bathroom. One man is trying to remember childhood happenings and it is portrayed as overflowing file cabinets of memories. Finale: Their sick friend comes to life as an alien defending earth from an evil alien. He had come from the future to protect earth. I thought it was an M Knight Shalaman movie, but I can’t find it in his list.