A
Adam W
Easy to do on a grid switch - I may or may not have done that before, taking out the supply for the board and damaging the breaker next to itLost the GS38 boots for the probes. Continued using it. Stroked an exposed probe across L +E one careless day. Wasn't much left of the probe.
The worst I got was a bit of a dent in the probe - the tester was perfectly functional after that.
I learned my lesson.