a good use for this

when the next twilight movie comes out, people who are projectionists or have access to the projection room should replace the twilight movie with this. show the regular trailers and everything first so it seems like everything is fine....then slaughtered vomit dolls starts. or maybe show the first ten or fifteen minutes of the twilight movie and then it switches...might keep them in their seats a little longer..."Is this some dream sequence or something?"....
have hidden cameras pointed at audience for their reactions.