I was once in a queue at a shop, and this man was working his way up the line, saying 'I only have this one thing, can I move up in front of you?' Well, being British, even though people didn't want to, they were letting him through. He got up to me, asked (and I was one from the front) and I said 'No' (Iwas rude, I know, but I was in such a bad mood). He scowled, but I bought my three items (he didn't have to wait long) and moved on. Well, I had to hang around near the till for a while (There was another counter I was visiting, and I had to wait) and frst he had a problem with his item, then he had to change it, then he had to ask for a price, then his credit card wouldn't work, and then his second card wouldn't work and then he counted out the money in pennies and stopped in the middle to take a phone call! His one item took twenty minutes! I know that the people behind him were regretting letting him through. Now I won't let people through unless they're elderly or can't stand for a while.