The only problem with a zero airspeed/negative groundspeed auto is that you need to have enough height to convert back to a normal auto before you carry out the EoL. When you do the recovery, note how long it takes the RoD to get back to normal after you have achieved your normal auto speed.
Riding a pocket of air...........hahahahahahahahahahahahah.......good one
Is that from 'My first Book of Helicopters'?