Okay, so when I dream, anything can happen. I have had dreams within dreams, and there was no special time ratio. Everything is so contrived, when, as others have mentioned, the director could have done just about anything he wanted since it is a dream. I'm not sure how people can dream together and have any kind of dream harmony, or effect any outcome on others. None of it makes any sense, and it's just a skeleton on which to hang crappy computer generated images; those beach scenes are especially cartoon-ish and pathetic. I love Leo DiCaprio and Joseph Gordon-Levitt, and that the two of them together couldn't redeem this pseudo intellectual turd of a movie just shows how bad it really is.