I'm retired from a electric utility. I've had a few shocks/blasts. The worst was when I was in a basement of a church changing out the electric meter. It was a 3 phase, 120/240v, 4 wire meter. I jumpered out the service and pulled the meter. I grabbed the new meter and plugged it into the socket and BOOM...the new meter blew up right in my face.
The pastor of the church heard the blast and rushed into the mechanical room where I was at. I lost my vision (temporarily) and the pastor called 911.
I was taken to the hospital with burns on my forehead and no more eyebrows.
I spent a couple of hours in the emergency room and went home with my forehead wrapped in bandages and no damage to my eyes. I was lucky...it could of been worse.
The company did a complete investigation and could not determine what caused the blast.
This all happened before safety glasses and face shields became mandatory.