This video from YouTuber beachj0 includes no explanation, but my belief is that there are one or more cylindrical magnets embedded in the plastic bait worms (possibly by casting them in place using the DIY bait molds commonly sold to fisherman), and several more magnets attached to a platter rotating beneath the table. A simple effect, but strikingly creepy. [via Propnomicon]
More:
Came across the other video posted of the underside of the shelf:
tl;dr 2 discs with magnets that rotate via the belt/pulley shown in the above video.
This is an entry in HauntForum.com’s Technological Terror contest by a member named GOT.
Here is a link to his entry: http://www.hauntforum.com/showthread.php?t=23882
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