VeeAny, we're all here to learn, and as Tokoloshe says, this is a difficult one. Without the training and/or good mechanical knowlege of the aircraft, it would be tough to know what to do in that instant when the rpm's start going wild, Nr's going south, noise from the flailing shaft, engine horns, etc, etc.
I don't know of any governing systems that could control an engine through this failure, certainly not the FADEC in my 407, and not the old Bendix (or Ceco) system in the 206.
Well posted Tokoloshe, and flown with excellence!