Spoilers obviously: I just watched it, I got what happened but how did all this time travel stuff work? What was up with the brain tumour stuff? What about the laundromat place, did that have some sort of significance? What was up with the final scene? The investigator just randomly appears way back into time? I sort of got the story, but at the same time I just thought.. WTF.

Just an overall explaination of what happened, and what this movie was attempting to do..