Either (or both of) roper grounding or a residual current detector would have made that day of mine a lot less exciting. I'm still happy using metal-cased mains

Either (or both of) roper grounding or a residual current detector would have made that day of mine a lot less exciting. I'm still happy using metal-cased mains powered devices, but I'm somewhat more careful about checking those two things before I hang on to them tightly these days...