With my son the first thing to happen is his hours reverse. He will have go from a daytime awake schedule to being awake at night.
He will become restless and unable to sleep. His pattern becomes, eat, try to watch tv or try to play video game, try to fall asleep. He will actually triangle between the kitchen his computer or tv and his bed. He will become desperate for sleep and the voices are so loud he can’t sleep. This all happens when his scz is cycling towards more psychosis and frequently ends in a total break.
He can also be triggered into a psychotic break if something frightens him or a loud noise startles him.