I remember one from the 60s in the US. It ran only once. In it a radical Black Panther type character leered into the camera, up close, wide angle, and said: Black is beautiful. The camera then panned back and you could see behind him a timorous white clerk, bow tie and all, behind the counter at a hardware store. Clerk says in a jittery voice, "Yes, sir, but on a colonial home?"
It was a paint ad...