So, what DID happen ?
I've been trying to puzzle this one out for a few weeks, and despite asking around haven't come close to an answer which seems right.
Imagine a short finals in a B206 to a site which is actually on your left hand side. Wind is between 10 and 20 knots, occasional gusts, from your right hand side. Arrive in a top of IGE / bottom of OGE hover, with the site still to your left, and the wind still from your right.
Next thing, you've turned 90 degrees nose left, and are heading towards the landing area. Adrenaline rush time, but all turns out well.
So, back to the question - what did happen ? Someone watching said there was a large gust at the time I arrived, other than that nothing else - power requirements when departing the same site a few minutes earlier (pleasure flying, you see) was about 95% TQ, no TOT or N1 limit.