***Horror adventure in the Mayan jungle*** RELEASED IN 2008 and directed by Carter Smith based on Scott B. Smith’s novel, "The Ruins" refuses to make the mistake of too many conventional horror flicks by NOT going over-the-top with the situation, the "monster" or the horrific thrills; films that do so are usually more goofy than horrifying. Take the ending of "The Ruins,” which is different than the book and, in my opinion, better: In a typical horror movie there would've been a wild (i.e. thrilling but totally unbelievable) vehicle pursuit by the Mayans; not here. It's the BELIEVABILITY of...