Yesterday evening I went to hear Steve Parsons and Ciaran O'Keeffe, from Living TV's Most Haunted, do a talk called How NOT to Investigate the Paranormal.
The event was hosted by The Skeptics in the Pub, a group that meets in the Penderel's Oak pub in High Holborn, London, to analyse topical subjects with a critical eye.
Let's face it, Most Haunted is hardly difficult to debunk. Even those of us who believe in ghosts - and I count myself in that number - can hardly accept that all the spooky stuff portrayed on the TV show is for real.
I didn't need the two parapsychologists to confirm that most of the so-called psychic impressions given by medium Derek Acorah were based on prior knowledge. I also didn't need to be told the noises, lights and gusts of wind that have Yvette Fielding screaming that there's a ghost in the room are really just normal phenomena. I knew that already.
Nevertheless, the behind-the-scenes anecdotes were fascinating, such as explanations of verbal techniques used by the show's psychics to pump people for information before filming starts and practical jokes played on team members to set them up with fake information.
Steve and Ciaran also talked about scientific equipment used for ghost hunting, debunking much of it. EMF meters, night vision goggles and laser thermometers might look great on TV, but apparently rarely find ghosts.
They also had a few cautionary tales. Since programmes such as Most Haunted have become popular, the number of people believing their homes are haunted has soared. Some get ripped off for vast sums of money by unscrupulous people who claim they can exorcise the property.
Ciaran said: "If you ever think you have a ghost, you don't want an exorcist, you want a skeptic. Nothing ever happens when a skeptic is around."