Are There Any Restrictions On...
ChatterBank0 min ago
No best answer has yet been selected by Drusilla. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.Its called a Theremin. Very popular in Sci-Fi, horror and surrealist films. More info here:
http://en.wikipedia.org/wiki/Theremin