Don't know Mate.....kept my eyes closed the whole way down!
When the other guy did that last gulp of air thing filling his lungs to scream....I pulled Pitch to the up stop and held on for the impact.
Actually the video does not completely compare to the maneuver we were doing.....as we did a noticeable deceleration but no where as deep or held as long as in a normal ordinary Autorotation in that there was very little airspeed to trade for RPM or need to slow. It did require some ground slide if the wind was slack....and none if there was some decent wind.
Practice Autorotations in a Jet Ranger are pretty tame.....as compared to the Hughes 500 Series or the BK-117. The Hughes and BK are far more fun and sporty.