Excuse me? You mean in to this machine here? Where I am facing, and further still where my finger is actually poised to press the little number buttons, and where the screen clearly says 'PLEASE WAIT'.
Oh. What an absolutely first class suggestion, till-person. I only wish I had thought of it first.
(words cannot express my anger, and it happened over an hour ago. It must be the millionth straw that broke the camel's back)