Fast Food Confusion

So I go through the McDonald's drive through at lunch to get a salad. (Yep, a salad). When I finally make it to the speaker I hear, "I'm sorry for the inconvience, but my manager has informed me that I can no longer take any orders. A bus has just arrived and we have to clear up all those orders first. I'm sorry." What the . . . ? I ain't lovin' it!