There was once this guy, a victim of a blast, not too long ago.
As the fatal explosion occurred, shrapnel entered his body, like it did to others around him. Others died.
The biggest piece that entered his body was a bullet casing that went in through his chest, missed the heart and lungs, missed the great vessels carrying his life-blood, missed the gullet and the windpipe and lodged at the back of his throat.
And all the doctors had to do was to make a small slit and remove it from there.
Two ball bearings also hit his face, neatly entering on either side of his right eye and getting stuck in the skull, leaving his eye - and his vision - intact.
Luck? Good karma?
I don't know... do you?