One busy afternoon we were inbound to one of my favourite African destinations with a new controller asking for our position every minute or so. 'Three-zero-two radial at seven-seven DME, over. Three-zero-two radial at seven-one DME, etc, etc.'
This became a bit wearing so that I finally told him, after about the fifth request, 'I'm sitting up front, over.' We were able to motor most of the rest of the way in blissful silence!
In another, related, case, someone was approaching the same spot in an HS-125, really moving. Came the same request, with a position report given, followed by,'Say again?'
So the first answer given differed from the second, and so on, due to the speed of the HS-125. Finally the controller asked, 'Ah! Ogah! Why you no say de same numbah twice?'