I once did something similar, in a way.
I was somewhere with a lot of kids (I think it was Chuck E. Cheese or somewhere else that I'd prefer to forget) and my kids were running around being a bit wild, and I had had to speak to them a few times when they were getting out of control and being obnoxious.

I was aware of a presence next to me doing something irritating and turned to tell him to knock it off, then realized that it was some random black kid before I had spoken more than three syllables. He and his mother looked up at me in surprise, and I said "Sorry, for a moment there I thought he was one of my kids."

The woman gave me a very strange look and dragged her kid elsewhere.
( The Resident Loon Not a demographic. Do not measure., Tue 1 Mar 2011, 12:41, Reply)