One of the most frightening incidents of my career was the collapse of the rear cross tube on a Bell 214 ST. Luckily nobody was underneath it at the time. I have also seen 212 rear tubes break on a couple of occasions.
The 214 was a contract maintenance job, When the first 214 demonstrate aircraft came to us, Allan Bristow took one look at it and said " anyone putting an aircraft that weight on skids wants their head testing".