I worked in a factory in the late 1980's, and we had a guy with some art skills on second shift. I still remember coming in one morning and there was a huge mural drawn in pencil on the bathroom wall 8' high and probably 12' wide. A giant palm tree and some other stuff with the words Welcome To The Jungle. Yep, it was right after Guns N' Roses released that..."Please write down the craziest thing you’ve ever found in a public bathroom:"
Oh man...today is going to be a good day for some researcher.