The idea that it is "impossible" to go vertically upward from a vertically downward autorotation because you will somehow slip into unrecoverable vortex ring state is simply not true. The myths of vortex ring state are legend, and hardly worth repeating, so let me state the opposite:
The real rules of Vortex Ring State:
1) If you have lots of excess power, you can lift collective and fly vertically out of VRS. VRS is not a Black Hole, it is a place where the rotor has greatly increased power required, because it is wasting so much power recirculating air. If you have enough excess power (about twice the power needed to HOGE) you can simply apply collective and smoothly go from descent to climb, a vertical climb.
2) In a zero knot auto, you can recover with engine power and climb vertically, without gobs of excess power (but certainly with more than HOGE power) just do not dwell at VRS state descent rates (about 1500 to 2000 fpm for most helos, 1000 or so for light pistons) but rather climb smartly trhu the descent into a climb.
3) If you have enough rotor inertia, you can land from a zero knot autorotation without rolling up the engine throttles, simply lift collective and time it right. You will NOT experience VRS as you stop the descent, not even a burble. The flow for VRS has to establish, it does not automatically present itself when you get a momentary combination of ROD and speed. I have done these by the dozens in Bells, and VRS is not a consideration.