creator and ghost hunter Zak Bagans has investigated unusual paranormal activity since the show premiered in 2008, and he recently sat down with ET to look back on a few of his spookiest scares and happiest haunts to celebrate its 15th anniversary.«Fifteen years of, it's kind of like a celebration,» Bagans said of the franchise's milestone. «I love doing it. It's just a total break from the material world, which I have gotten very bored with.