The Joker threw the unconcious body of the prison guard across the hall as he began walking down the corridor with a regal step, laughing all the way.  He made his way up the stairs to the roof acess of Arkham Asylum, the spotlights of the Asylum playing crazily about the roof as he began to step across, encountering a line of frightened doctors sent to cover the roof after the security system failed.<br/><br/>The Joker laughed his horrible laugh as he pulled an odd cylindrical object out of his straight jacket cloak and threw it towards the doctors, dashing towards the edge of the roof holding a broom in one hand.