With the mention of the engine remaining running, and slides being blown around, I wonder who initiated the evacuation- Flight deck or Cabin crew. (I can't quite bring myself to read back through the thread to see if it's mentioned.
I once had a conversation with one of the more seasoned number-ones, who took the view that if she started an evacuation without instruction from us on the flight deck, then her responsibility was to the greater passenger load as a whole, rather than the unfortunate first one down the slide and into a still running engine...