Quesclamation Mark‽

Some time ago I learned about the a nonstandard piece of punctuation called the interrobang (or alternately interabang or quesclamation mark).  There are times in writing when one wants to simultaneously exclaim and question.  In comic books and the like this situation leads to the use of a question mark and an exclamation point together--i.e. "?!".  This however is poor form in formal writing.  Therefore the interrobang was invented.  It is a question mark and an exclamation mark combined.