From the point of view of a very ground based, non aero engineer, it seemed to me that the load/unload dynamic was almost sinusoidal. No great stress pulses in the system at all.
From what I saw, he translated from forward flight into forward flight in the opposite direction with a single turn. The nose pointed at an axis about a length and a half in front of the canopy and I don't think the helo actually passed directly over the target. Nevertheless, he plonked the hook more or less in the logger's hand at zero miles an hour.
Like playing the piano or flying a helicopter - I wish I could do it at all, let alone that well.
Roger.