Aleksandr Sokurov's Mother and Son is barely over an hour but it's probably the slowest film I've ever watched. There are only 2 people in it: a dying mother and her loving middle-aged son. You never know what happened to the father, or if there were other siblings.

The son cradles the deeply ill mother in bed, and they speak of the strange dreams they've had. The mother wishes to walk and the son asks gently if she is just pretending to be ill. She says yes she is pretending, and he carries her carefully in his arms around the countryside viewed through dreamscape angles. You understand that this is their last hour together and there won't be another such moment.

Later the son says: "People live for no particular reason but they die for a reason." I wish that isn't true for me but I can't really be sure.