Tradesmen and women, what’s some of the craziest things you’ve seen in someone’s home when doing a job?

My neighbour is having something done in his home, which I know is extremely messy, and I just heard one of the guys come out and say to the other ‘it’s a right f*cking state in there’… which got me thinking that trade workers must see some real crazy stuff entering other people’s homes… anybody want to share?