This is another one of our 3 endings, this is so far the favourite one as it leaves the film on a cliff hanger, leaves the audience thinking and using there own imagination, and time for them to reflect back over the movie, The swapping of the birthday cake sybolyises that it was her birthday all along. and it was just her imagination, but then again the audience can assume there own ending. The candles will gradually melt, as the camera shot fades out, the time it takes for the candles to fade out will allow time for the audience to conclude there own ending and start piecing bits together from the film. i Think this is the most effect full ending and would work well, but we will have to experiment to see which one works the best.