Capt Crash,
Was this chap looking for a job?, in which case I feel his remarks would have done him more harm than good, after all, do we want to be constantly pulling knives from our backs?.
I my experience, if an Instructor has had a close shave, the information is usually volunteered as a means of stress relief.
What goes on in the plane is between student and Instructor and unless there is a clear hazard to other aviators should be kept that way.
This guys' actions could destroy a students' confidence and damage an Instructors image.
It sounds, from his advanced knowledge of RT as if we should all be queuing to give him a job!