At a training school in the 80's, one B47 G2 cut the T/R drive shaft with the blades due to a heavy EOL. The instructor thought they had got away with it and was winding up the rotors again when he had an R/T call from a colleague to say "The T/R's not going round - is this normal??"
On another occasion, late intervention by the instructor during an EOL and the T/R struck the ground during the flare. T/R and its gearbox separated from the tailboom. The skids were still a metre or two off the ground at this stage and the five or so "landings" were quite interesting. A/C written off but instructor and student unharmed.