Have you seen the Guillermo del Toro produced horror film Mama yet? I really liked the first half of the movie and the concept. But the second half of the film was terrible, and the ending was was ridiculously bad. It wasn't the subject matter that pissed me off, it was just the way it was executed. It felt rushed, and it seemed like they just didn't really know how to end the movie properly. It could have been done a lot better. Anyway, even though the end of the film ruined the whole movie for me, there's a very creepy and cool behind the scenes video showing off some of the motion tests of the ghost. This is actually a lot scarier than the film itself. Check it out!