I just have to get a few words in here. The technique is to get the pitch down (not in a huge hurry, certainly not as fast as you can) and lower the nose a few degrees. In 2 or 3 seconds, the RPM in a 206 won't decay all that much. There is no negative G load, unless you screw it up. If you get the entry even close to right, you end up in a normal auto, with just enough airspeed on the bottom. The point of doing this is to simulate an engine failure on takeoff from a platform - most offshore platforms are in the general neighborhood of 100', & while it isn't all that common, an engine failure here is probably slightly more likely than most other times, since you're applying a lot of power, often 100% torque, from flat pitch. Granted, the practice auto here isn't completely realistic, but it's better than nothing, when that Roll-Royce decides to come apart in little pieces just as you clear the fence on the edge. And a Roll-Royce (nee Allison) will do that to you now & then.
I've done this in the 206, & do it annually in the 412 and the S76. In these aircraft, it's just one engine, & it's not that big a deal, but in the sim, try having both engines fail at the same time. It gets your attention, but the repairs are quick & cheap.