Some people with bipolar disorder may become psychotic when Manic or Depressed

 "Some people with bipolar disorder become psychotic when manic or depressed, hearing things that aren't there. They may hold onto false beliefs, and cannot be swayed from them. In some instances, they see themselves as having superhuman skills and powers -- even considering themselves to be god-like."

 http://www.bipolarhappens.com/bipolar-i-and-bipolar-ii/