My personal wish is that next time you ask the question as neutrally
as possible, somethig like, "May I please ask why you inspected the
previous customers Federal Reserve Note and not mine? Or whatever
question would fit the circumstances you're in at the time. Please
make sure not to give the game away by mentioning anything about
race. It would be interesting to know what they'll say. And please
let us know the results, no matter how it goes.