You're going to feel pretty stupid when the engine seizes at 50,000 rpm!
One interesting point to bear in mind with types where the advice is to bring the engine back to idle, is that the fuel burn will be greater than on single engine. On my current type the advice is bring it to idle and if the engine parameters stay normal reinstate it for the landing. Meanwhile you will have used single engine fuel burn and TAS coupled with an engine doing no useful work and burning 35-40 kg/hr. Could make quite a difference on a long leg.