Then there was the story told to me by an ex ETPS instructor about his experience.
They took off from Farnborough, my friend in the right hand seat ready to teach a trainee TP about asymmetric flight; unusually for a Viscount, they also had a flight engineer.
Departing from the south westerly runway, at about 500ft, my friend cuts power on the starbord inner; the trainee thought it was the port inner(no I don't know why) and feathers BOTH port engines, leaving them with the starbord outer, yawing to the left and descending towards Caesars Camp, a hill south west of the airfield. Before they could take any further action, the F/E pushes between them and starts frantically unfeathering props and opening fuel cocks etc saying 'fer Christs sake let's use two at least'!