My printer crime was worse: 37 years ago I was leaning on the central heating radiator in my student room and I wondered why it felt 'live' and my hand 'buzzed' as I rubbed my hand over it.
Turned out that it was earthed and EVERY mains earthed metal object in the room was live.
Problem turned out to be
1. Earth wire had disconnected in the mains plug feeding a 4 way power outlet strip powerin the entire room.
2. The 1950's Creed teleprinter I was using as the printer on my M6800 based computer generated a lot of mains borne interference from the motor that it used to turn all the cams inside for the mechanical 6 bit decoder.
So I fitted a mains suppression filter and for some bizarre reason I soldered the can of the filter to mains live rather than earth....
Result was all the time the printer was powered from the mains, the room was live.
I fixed the wiring and lived.
Around that time I often picked up live equipment by the live wiring and carefully put it down again.
The most painful was an open chassis Motorola 12 inch CRT monitor where the line output transistor was placed exactly where I put my hand to move it....