Abstract: An amusement trick device for playing a practical joke on an unsuspecting person; the device including a can having a freely rotatable windmill wheel mounted thereabove on a support, an inner tube having a first end extending into a side of the can, the tube extending through the can, and its other end being directed against the windmill blades for rotation thereof, the inner tube first end being hidden inside an outer tube first end that extends only into the interior of the can, the inner tube having its first end, air intake opening hidden at a side of the outer tube, while the outer tube has its air intake opening at its terminal end, a quantity of finely powdered graphite being inside the can, and the can having a row of perforated openings on its side wall, near the can upper end and located above the sideward projecting tube first ends; so that a knowledgeable person covers the outer tube air intake opening with his tongue, and blows only into the air intake opening of the inner tube, so as to cause th