Why thriller/mystery?

Great, really great done job by Abbie...everything is so like: you know, daily chatter around neighbourhood with grannys sitting on the benches etc.
IMO, think that this movie is not thriller or mystery....but, ok, don't blame anyone, and I don't wanna be pain in the a*s.....Americans didn't pay attention as they always do with indies(very good as "The Girl" is) cheers.