The City of Atlanta had the bright idea of installing a working traffic signal outside the Traffic offices in City Hall.
It's an open atrium with a walkway around, so lots of people from the surrounding offices go over to City Hall to 'mall walk' on their lunch hour.
I was over there with some friends, and paused at the railing to lean down and look for some other friends. My shoulder brushed the traffic signal as I leaned next to it and ......... ZZZZZZZZZZZZZAP!
I wasn't hurt, it was only a momentary contact. I was pretty irritated though, and I went boiling into the Traffic offices and raised a little perdition right there. Called them seven kinds of idiot for not grounding the unit (when I looked underneath, there was the ground wire just hanging there. Idiots.)
It was gone the next day. I'm pretty impressive when I'm mad (little dark warlike Scotch-Irish woman).
In my former line of work I used an AC voltage detector in homes.
You would be astonished how many appliances and other electrical devices, especially older ones, are “live” to the frame. Only thing keeping people from getting electrocuted is the insulation provided by their shoes, the carpet, the wood subfloor, etc.
Love your home page.