While watching BLACKWATER VALLEY EXORCISM, I encountered scenarios and dialog so incredibly bad that I was convinced that this was supposed to be a comedy. A few choice bits of dialog worthy of a belly laugh: "I ate a rabbit." "I TOLD you she was possessed!" "Are you telling me the Devil is in my daughter?!"
There are many, many more, but you must discover these for yourself - if you dare.
The story goes off into all sorts of directions and things happen that probably shouldn't and everyone seems to be a perv or psycho of some sort (even the Priest). And I haven't even gotten to the bad acting. Most notable in this area is the fellow playing Isabelle's father. The director must have just told him to act like he's got a stick up his @$$ because that's the general impression one gets.
I don't really want to steer anyone away from BLACKWATER VALLEY EXORCISM because there is entertainment value to be had...for all the wrong reasons, but if you're looking for a decent horror movie that makes sense and is actually scary...well, run don't walk.