Bone in my left hand.
Some one opened up a fused isolator in a sub station at the harbor I used to work at.
This brought in the stand by plant, if I could not get the switch shut it would switch onto mains supply and blow everything up
My brave staff all ran away and left me with a jammed isolator switch.
I squated under neath the switchhandle and pressed for all I was worth.
As the switch shut I felt the bone in my hand snap.
It was like a shock through my body and I knew straight away what had happened.