Back in the eighties, I worked at a company that produced large amounts of laser-printed direct mail. That's junk mail, for those of you in Rio Linda.
Laser printers were brand-new on the scene, especially at industrial scale (which we were).
There was an issue concerning the toner that needed to be fed into the printers to make them work. Something about work-place safety.
Our IBM rep was a very personable black dude. He was at pains to provide assurance that the black toner stuff presented no hazard.
But he added, "When I started this job, I was white!"
Hahaha...a black guy with a sense of humor!