As you may have worked out a turbo-prop is going to be much different than a piston twin. Even a free turbine engine may have different procedures from a fixed.
In the case of a piston twin I have seen an instance of an engine over-speed where the prop could then not be feathered. If the pitch control cable breaks the governor spring moves the prop into full fine. The engine instantly over-speeds and slowing the aircraft down is the only way to get things back under control.
As you pointed out the question may be a little too general.
There will be a range of possible answers. The P&W 100 series one is common though.