I had had a piece of rust removed from my eye 15 years prior, they insisted on checking my eye with some sort of scope before allowing me to proceed w/ the MRI.
:-(
The MRI pulled up on the sear, internally. Short of an empty chamber, there was nothing that could be done to avoid this discharge. No safety "failed". All the the thumb safety did was to keep the weapon from chambering a new round. This article appeared at my forensic site last May, and apparently occurred eight years ago.
Horatio
;-)