I started looking into the Vuichard Recovery Technique a few months back and quickly realized the potential it has in making a recovery from Vortex Ring State at low height. Mr. Vuichard was most helpful in explaining the maneuver and the dynamics of it to me over the phone. Here is a link to a Rotor & Wing article about the phenomenon that is VRS and the Vuichard Recovery Technique.
The Wonders of Vertical Flight 