Anotherplot question

Rating: 6/10 (20 January 2005)

Why did the movie start the way it did, with him in the psych ward during the time line after kaylie had died? I don't understand why they chose to start the movie that way? And I had read some posts about evans blackouts not being really blackouts but they are just time lapses from when the adult even goes back in time. But then why did he black out in the first scene where in the basement they tried to make the movie? Something monumental should have happened there, but he only woke up from the blackout and asked why he had no clothes on.
And one more thing, what about the scene with the knife in the kitchen, why did that happen?