There’s no need to leave the high-caliber theatrics to Disney when there are DIY guides like this one floating around. Bring the Haunted Mansion’s Singing Ghosts to your front porch.
One of the many memorable illusions in Disney’s Haunted Mansion is a quartet of singing ghosts. This clever DIY Halloween hack combines a digital projector, four cheap mannequin heads, a YouTube video of the ghosts, and an Arduino-powered motion sensor to recreate the illusion on the cheap (and without a staff of Disney audio/vision engineers).
Watch the video above to see it in action (note: the audio seems strangely out of sync at the end of the video, but the YouTube source video is properly synced) and then visit the link below for the full guide.