Err...is it the end of the world as we know it?

Today I wandered into Sainsbury's. As I was wandering round I overheard:

Customer: "Do you sell limes?"
Shop assistant (surprised): "Yes."
C: "Where are they?"
SA: "With the fruit and veg."
C: "What do they look like?"

SA, with a bemused look on her face, takes the customer to the limes...

Alice.