The Wacky World of Dr. Morgus
In 1962, New Orleans horror host Dr. Momus Alexander Morgus starred in the movie The Wacky World of Dr. Morgus. In it, Dr. Morgus invents an Instant People Machine that can transform people into sand and back to their original form. Morgus and his assistant, Chopsley, have to stop a plot by Microvanian spies to take over America.
Here is the trailer, courtesy of Meet Cleaver Theatre:
Though hard to come by, the movie was released on VHS on November 6, 1996 by Ivy Classics Video. So far it has not been released on DVD.
Here is a scene from the movie: