When a situation or person becomes extremely unpredictable or irrational, we often say that they "went off the wall." However, there are several other phrases that can convey a similar meaning. One such term is "lost it," which implies that a person has lost control over their emotions or behavior. Another expression is "went berserk," which suggests a sudden and intense outbreak of anger or violence. "Flew off the handle" is another phrase that can be used to describe someone who suddenly become extremely agitated or irrational. No matter which phrase you use, they all refer to a situation or person that has become uncontrolled and unpredictable.