I did a Robbie saftey course earlier this year that Tim Tucker (R22 test pilot) spoke at - he had all the video footage from the R22 and R44 Auto Certification tests which showed autos entered from every edge of the auto curve and what happens if it is exceeded. All autos were done onto tarmac or into water with floats, the throttle was chopped with a 1 second delay before lowering the collective. One R22 got bundled up on the runway in the process but it stayed upright.
With the R44 autos, If we weren't told they were autos you could think they were just fast approaches......... Most impressive.