Overcoming Self-Destructive Behavior

I told the social worker that I was still feeling like hurting myself and stabbing other patients. I gave her the knife I stole from my lunch tray. I went into my room, closed the door, locked it, went into the bathroom, closed the door and pounded on the walls. When I came out they gave me a pill and an "Overcming Self-Destructive Behavior" workbook. I feel better now after the pill. Thank God for pills. I don't think the workbook was a good idea though, it just gives you more ideas, like hitting your head against the wall and hiding meds to overdose on later. I didn't know hitting walls was self-destructive, it seems like it would be wall-destructive.