I have been testing out my ability to produce special effects for the
Jack movie. In one scene the demon turns into an a coin and then
back again. I found a free bit of stock footage of a puff of smoke
which I combined with a figure fading into view as when the coin
turns back into the demon. Never mind that the figure is not a devil
but a ceramic little girl and the background is a photo of a giant
mushroom. The whole thing could be scaled to fit full sized actor
in front of a set or location. It can also be run backwards to show
the demon turning into the coin. This is six second Quicktime clip.
It should play in Quicktime Player and Windows Media Player.

Erick