supermarket: which one hour slot would you like to deliver within?

me: is that a real one hour slot or a "whenever you feel like it" slot?

supermarket: I don't understand

me: well are you going to turn up some time within that hour, or just turn up when you feel like it?

supermarket: it's a good slot, sir

(they turned up 45 minutes early, while I was in the shower. for the third time in two months.)