I remember this incident from my TTTE days...the instructor was indeed the "Well known gentleman" referred to in an earlier post. Best one ever was the SGO at TTTE trying to taxy off the runway whilst still attached to the overrun cable...He made it onto the taxiway and then the aircraft ground to a halt. He assumed (wrongly) that the brakes had overheated and seized. Bearing in mind the cable was some 1300 feet from the threshold, he did well to stretch it that far!