Indicates surprise at someone's sudden change in emotions or behavior.

Emotional Shift

Use when someone acts out of character or mood, typically in a negative way.

Mood Observation

Points out an unexpected change in someone’s choices or actions.

Implies that a person's behavior change may be due to an external influence.

Expressing bafflement regarding why someone is acting contrary to their usual self.

Suggests that something specific must have happened to cause such a change.