Smart McDonalds Workers

This weekend we wanted to get something quick for a late night dinner after shopping at Walmart. We went to the drive-in at McDonalds. We ordered a couple of burgers, and then my wife said, "And a large fry". I couldn't believe the response. "Is that a French Fry?" What an idiot! I wanted to say something but I just sat with my jaw in my lap, unable to believe what I had just heard. Anyway, just thought that was very strange.