Why is it that with all these ostensibly powerful testimonies and camera footage (always shot by "believers") and, in that video, people being attacked, plates flying etc. that it is never, ever captured scientifically - and any attempt to do so makes the phenomena become suddenly and strangely quiet.
I mean, why does Casper The Ghost happily interact so physically with the real world when people who believe in ghosts are there but never when there's an attempt empirically verify these interactions? Why are ghosties and ghoulies so afraid of scientists but will fill nine miles of believers video tapes without hesitation? Ohh, let me see if I can think of an explanation
*scratches beard* 
And that mark on the kids head early in the video would have me more concerned than anything else - my first thought was a ghost story variant of munchausen by proxy.
I've heard strange noises in the night, I've put my keys down and found them somewhere else while being sure I didn't put them there, I took a dump one morning to find all the toilet roll had been used and I didn't remember finishing it. wooOOOOoo spooky, huh?

Sorry, I don't mean to offend anyone's beliefs with my facetious, if a little sarcastic, humour but (grabs friends and shakes them collectively by the shoulders) come ON people!