Do we know if the blade strike occurred before or after the survivor was winched out of the bush by the 139? If I recall, the video that was broadcast on the TV news shows the 139 winching the survivor out of the bush with the 412 hovering close by. I can't imagine after a blade strike as described that the 412 would hang around and watch whilst the 139 completed the rescue. Makes me suspect they went in after the 139 departed the scene, and their job was to recover the deceased passenger. I didn't see much in the way of low cloud on the wide shot of the winch. I'm only speculating here, but it would be an interesting development if the 412 whacked the trees after the 139 completed the rescue. No doubt all will be revealled at the subsequent enquiry.