After the the Dementor attack, Harry is expelled, and arrested for the murder of Cedric Diggory. Betrayed by his friends and Dumbledore and tormented by visions from Voldemort, Harry retreats into what he believes to be a dream world and swears revenge.

Harry potter has the ability to survive al most any situaton that he come across, The reason why? He has a guardian, who, has his hands full keeping him alive.