dragman has it right! The tale is a scary one, but only to those who congratulate themselves when they make a successful landing. The idea that through turbulence lone he experienced lower than 1 g for more than a fraction of a second is simply not believable. The roll he described could certainly have been caused by the disturbance, sans low g, but then the dialog would have been much less like Poe and more like Gann. Give us a break here, guys!
From 140 knots in an S76, you cannot sustain zero g for longer than 2 seconds, on purpose. This fellow saw nothing like that folks!
Please remember that 'low" g is not zero g, and it takes close to zero g to lose a robbie, in fact, it takes some pilot help to make air turbulance into a robbie-killer. Typical helo turbulence against the highly loaded blades of the helo don't create less than about .6 g ever, and more likely perhaps .8 g. Can someone who flies with a g meter please chime in?
When everybody is finished congratulating the poor sod for flying into turbulence, can we get back to ppruning?