Fog Jack-o-Lantern

Here's a Halloween jack-o-lantern that spews real water fog. All you need to do to duplicate the effect is to carve your pumpkin, fill it up to the mouth with ordinary tap water, and insert a water fog generator such as you would find at a home or novelty store for use in tabletop fountains.

The only trick is to be sure the mouth is carved up high enough that you can have enough water in the pumpkin to cover the fog generator. Since the fog is water vapor, the effect is completely safe and totally cool.