Yeah, happened in Oz too in the 80s, lad in an R22 needed a hose, put it onto an uneven rock on top of a cliff, and stepped off the skid (shoulda kept standing on the skid.) It started to hop a little, he rapidly replaced the hose and tried to grab the aircraft by the struts and engine mounts, it kept hopping towards the edge, and he suddenly thought "WTF am I doing?" and let it go.
It took a while for his mates to realise he was missing, and some more time to find the wreckage at the bottom of the cliff. Not sure what they felt when they saw him on the top of the cliff, whether it was relief at him being safe, or thoughts of murder for letting it happen.