It is an amazing talent. Leon Dewan has many such talents, considering he is one half of the amazing electronic duo Dewanatron, who build custom synthesizers according to peculiar algorithms and then perform with them.
But Leon can not only create confusing electronic devices. He can also, by means of great effort and muscle control, make a high-pitched whining noise that attracts felines from everywhere. When he lets it fly, cats from the entire neighborhood stop by to see what is going on. Amazed as I am, I still have the wherewithall to grab my trusty DV camera and record the following, for all posterity.