A sentence ending with an interrobang asks a question in an excited manner, expresses excitement or disbelief in the form of a question, or asks a rhetorical question.
For example:
In informal English, the same inflection is usually notated by ending a sentence with first a question mark and then an exclamation mark, or vice versa. Many people are unfamiliar with the interrobang, and would be puzzled when first seeing it, although its intention is usually self-evident.
