A long time ago I had a digital multimeter blow up on me. I was visiting a friend with a machine shop and his overhead hoist had stopped working. ....edit....
The short circuit blew 20 amp fuses in the disconnect for the hoist, 150 amp fuses in a sub panel and 250 amp fuses in the main disconnect for his shop. I learned a valuable lesson that I'll never forget. The cost of that lesson could have been much greater. Enclosed is a picture of the type of meter.
Sounds like the meter was on something other than volts to create that much havoc.
I suspect this is what happened. A couple of my old bench multimeters just like that Radio Shack Micronta use the same terminals for amps and volts so turning the function switch the wrong way while connected to a voltage source can be bad. One of my meters came to me with the 2 amp contacts in the cam switch welded together. At some point multimeter designers figured out that the current terminal should be segregated for safety.
Worst test equipment fail? Hmm ...
I watched the ground lead of an oscilloscope probe turn white hot and melt when it accidentally touched the wrong point. Luckily only the ground lead was destroyed.
When I was like 8 years old, I took my father's analog volts-ohm meter and used it to measure the wall socket voltage. It was 120 volts AC just like it was suppose to be. Then I measured the current ...
I left the first multimeter that I bought with my own money, a Beckman TECH 310, on the dash of my car and the sun turned the LCD black. I regret now not getting a replacement LCD from Beckman since I would still be using it.