Back in 1980, there were two of us working on an AC unit on top of a movie theater, an OSHA employee came up there and wanted to know where our hard hats were. He was going to cite us if we didn't get hard hats. We had to get down and go to the supply store and get some. Although there was nothing above us that could have fallen on us, other than bird shit. I wish I would have had a stupid sign and said, "Here's your sign".