OK, this is a story which I tell with some frequency, on the general theme of the sometimes-humorous (or is it humourous?) things that happen when British English-speakers try to communicate with American English-speakers (and vice-versa). . . (I could also refer you to my reply-comment to the Brighton Pensioner in the comment-space attached to this post). . .
A business-woman I know was travelling to London on business. She was met at the airport by a gentleman who worked for the company on which she was to call the following day. Said gentleman drove her from the airport to her hotel, and then, by way of making arrangements to pick her up in the morning and convey her to the office at which meetings were to take place, he asked her, "Shall I knock you up about eight, then?"
Absolutely true story. . .