Let us compare mythologies and movies

[Firefoot]

You surprise me, Firefoot. Being such a great writer as you are, surely you know that "?!" is not legal, so far as grammar and its laws are concerned?

Of course. But grammar has also always been frightfully dull to me... sometimes informal illegalities are needed to spice it up. See, look at this post - "of course" is a fragment, and the next sentence starts with a conjunction. "!?" fits nicely into that little club.