Many years ago, a friend of mine asked, in a small chemist's shop, whether they sold rubber gloves. The elderly lady assistant ushered him around to her side of the counter, opened a drawer and asked him to make his selection. The drawer was full of condoms. She thought that he'd asked for 'rubber goods'!
Last year, an American friend tried to purchase a can of Coke in London. He was completely confused when the shop assistant seemed to use an abbreviation unknown to him: 'ATP'. He said he didn't understand. The woman simply repeated 'ATP'. Once again, he said he couldn't understand her. Yet again, the woman (with increasing annoyance) said 'ATP'. My friend was also getting increasingly irate with her and the situation was getting very confrontational until someone stepped in and told him that the price of the drink was 80p!
I used to work at a railway station. A customer asked at the ticket office for details of how to get to Warsaw. My colleague carefully explained that he had to take a train to London, then the Underground to Waterloo, followed by Eurostar to Paris and so on. At each stage, the customer nodded to show that he understood but, at the end of the route description, he asked if that was the only route. My colleague then worked out an alternative route, involving a ferry from Harwich and onbound rail connections. Once again, the customer nodded to show his understanding of each stage of the route. It was only when he'd been given all of the details (and a massive queue had built up behind him) that he commented that he'd never had to take a ferry before. In fact, he didn't even know that there were any ferries in the West Midlands! (Yes, he wanted to go to Walsall!).
Chris