i'm a fan of insulated tools for all occasions, watched one of my best mates put a none insulated screwdriver through a hole of a fuse carrier in a 3P DB.
don't know why he did it and nor does he, he was only meant to be pulling the fuses to isolate the fire pumps, he just had a moment of madness.
thankfully he's never done anything as bone since then; and the look of shear terror he had on his face after he received a belt has always served as a stark reminder of why we take electrical safety seriously...
over 20 years later we still give him sh@t about it.