I love to come in and play with a wig or glasses or clothes. I love using props. I'm from the Peter Sellers school of trying to prepare for the character.

One of my symptoms included my obsession with ghosts and law enforcement - I carry around a police badge with me, for example. I became obsessed by Hans Holzer, the greatest ghost hunter ever. That's when the idea of my film Ghostbusters was born.

Certainly the format of ghostbusting lends itself to a videogame beautifully.

My great-grandfather, Sam Aykroyd, was a dentist in Kingston, Ontario, and he was also an Edwardian spiritualist researcher who was very interested in what was going on in the invisible world, the survival of the consciousness, precipitated paintings, mediumship, and trans-channeling.

I could sell used battery acid and make it fly.

Am I a trance medium? No. Have I got a gift psychically? Absolutely not. But I believe in the survival of consciousness after death.

I believe that if a man dies with a single penny still sitting in the bank, he's a fool.