I think this is meant to be realistic, but quite a few scenes just don't wash.
Laura leaves her bludging abusive partner Michael and goes to stay with her sister Joan. Michael can't cope with this, so he slips on his leather jacket, hops on his motorbike, moves to an abandoned amusement park and becomes a bad boy, harassing Laura and turning Joan against her own sister.
Laura leaves her bludging abusive partner Michael and goes to stay with her sister Joan. Michael can't cope with this, so he slips on his leather jacket, hops on his motorbike, moves to an abandoned amusement park and becomes a bad boy, harassing Laura and turning Joan against her own sister.