spoiler now know the end i find it so clever that the whole movie take place in a motel and each character have a different room . even sane people have many different aspect to their personality and but they do not let them become dominant they be control . malcolm various personality and need be personify in each character . the prostitute mother ( amanda peet ) and the part of him who hat her for be a prostitute ( larry ) and the loving mother he wish he have and the loving father he wish he have and the selfish part of himself ( actress ) and the violent part of his personality ( ray liotta and busey ) and the irrational emotion he feel and his need to be love ( ginnie ) and his attempt to control those feeling ( lou ) and the hurt little boy who see far too many traumatic thing in his life and and of course and john cusack who seem to represent malcolm himself try to analyze and understand all the craziness in his mind and try to follow the rule ( accept responsibility for the car accident ) and help others ( give amanda peet a ride and and stitch up the mother ) . very cleverly do .