Ghost Adventures Spooky Last Night!

I watched Ghost Adventures last night, and it was just weird. I mean what was up with Zack. Was he possessed? And if so how did he get rid of it? I don't understand why that boys home was any more haunted than any other place they have been to? I mean that one former hospital had over 10,000 people die there. Is it because it was kids? I don't know, but it freaked me out.