I come from a TV background, so for me this more like doing a freeing theatre piece because we'd go into a room and do the scene, instead of doing it as a wide shot, medium shot, and close up with only the odd line of dialogue.
I came on to the film with a very happy-go-lucky attitude which I think my character, Charlie, did when she went into the house. I expected it to be good, and then slowly things started to change for us all.