so i thought it was the period of time when you start dreaming..but then it turned out that "dream thing" meant the period of time when the world stops making senses and everything stops. In other words it probably meant that you so called dreams or wishes starts coming true. When that happens, reality is altered. For example, 2+1 can equals 4 in that world and everyone in that world seems that 2+1 equals 4 is perfectly normal thats because reality has already been altered.
So you want to know how the world would end?
Most likely it would get destroyed when all our wishes are being granted. For example, we wished that we can have something. Everything in this world stays in this world, nothing will be created from another dimesion and then appear itself in our world. Therefore when you wished for something, logically it would have to come from somewhere or someone in this world. Sacrifices are made just to fulfil your wish. When you wish for something,something bad normally comes along with it. Maybe you wished for world peace, something bad would happen in order for world peace to be present, maybe a total elimination of a group of people then there will be world peace..
so you might think what might be the least damaging and selfish wish you can ever wish. While you can always wish that the wish never ever exist or you wish that this wish never work. BUT if you wish that this wish never work then in the first place will that wish be called a wish if it can no longer be wished?
therefore you see, why wishes can never exist in this world.