Speaking of that vortex, I remember seeing something similar when I flew on a pilot's retirement flight. As I mentioned before in another topic, two LAX fire department trucks sprayed the MD-80 with arcs of water, dousing it. I was seated just in front  of the engines, and noticed that the water was being sucked off the plane in a spiral--slightly different than what you're mentioning, but similar.

And just how does getting a luggage cart jammed in an engine improve public relations?  :-? (Or is it just the comedy  :))

And Lou-- did many propliners have reverse thrust? I know the C-130 does, and I think the Twin Otter does, too, but how about some older planes such as the Constellation or the Stratocruiser.