Movie Horror

WARNING!  Absolutely No One Admitted During the Last 15 Minutes!

Not the first time I’ve seen that on a horror movie poster, and it never really made any sense. 

Who does that: shows up right before the movie ends and pays full price to see like ten minutes and the end credits roll?  Was there some form of chronic mass procrastination that people couldn’t get to the theatre in any reasonable time frame, so filmmakers had to institute a written policy? 

And I’m almost 99% certain the answers to those questions are far more interesting than this movie …