I can only mirror what everyone else has said in that the main thing is that no one was hurt which I'm very glad about.
What scares me about this thread (and another on this forum that I have read today) is how easily this appears to happen. I've had the zed for just under 2 months, my first RWD car and my first very powerful car. When I think about my route to and from work (narrow, windy, hilly roads lined with trees), something like this would almost certainly result in a very nasty accident.
I've had a 'wiggle' twice so far, both whilst going in a straight line, both resulted in the TC doing it's job and reminding me what I'm driving.
I'm already a cautious and careful driver, but the amount of people reporting driving normally 'and just loosing it' is rather worrying. Any tips from those of you with more RWD experience?