I know, I know .... it truly worries me that there are so many contenders for this title! Yet, this one - in the crawl space of a rental duplex, place originally built in the 20's - was bad enough for me to document on my way through.
First of all, I was delighted to see that there was a junction box used:
Next, I guess he ran out of Romex, so out came the extension cord:
Then he ran the cord across the floor:
He ran his circuits together, in a neat and orderly (unsupported) manner:
Finally, he was ready to go up into the wall: