"We don't believe in ghosts, " was Mahathir's characteristic response at the end of the assembly.

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"I wasn't scared when I saw her, I just got the creeps, " said the teenager who didn't believe in ghosts before his experience.

BBC: Traffic jam after 'ghost sighting'

Two in three of those who love Halloween believe in ghosts, 33% claim to have actually seen a ghost, and 28% believe people can really put a curse on someone that works, says DDB Worldwide.

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Especially if you believe in ghosts.

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Do you believe in ghosts?

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