Me too, however mine was an instantaneous failure! Overtaking at 85 mph on the M3, in a 1979 Golf diesel, when the cam belt 'slipped'. 22:1 compression ration and out of timing cam shaft made for an interesting few seconds. Of course, having managed to cross 3 lanes without power (but a large smoke screen to confuse followers) onto the hard shoulder, I was then reminded that the brake servo uses engine produced suction!
SAS, I would have replied with the bit about bunting causes Nr decay, but assumed a man of your Kaliber would have known