I have not quite had this happen but I have come close.

Stranded

On duty as a customer-service representative for a car-rental company, I took a call from a driver who needed a tow. He was stranded on a busy highway, but he didn’t know the make of the car he was driving. I asked again for a more detailed description, beyond “a nice blue four-door.”

After a long pause, the driver replied, “My car is the one on fire.”

Cute one from Reader’s Digest.

 Checkout Restrictions

I was in the express lane at the store quietly fuming. Completely ignoring the sign, the woman ahead of me had slipped into the checkout line pushing a cart piled high with groceries. Imagine my delight when the cashier beckoned the woman to come forward, looked into the cart and asked sweetly, “So which six items would you like to buy?”