Trainspotting

Dialects as misunderstood or foreign versions of English is an interesting idea; that they can create their own culture so separate from its parent that though they speak "English" its unrecognizable. Scotland, Ireland (especially Cork), and New Zealand are all disconnected from their colonists and so many generations later have designed almost their own language. The passage in Trainspotting where Begbie and Renton try to strike up a conversation with the Canadians on the train is a clear example. It's usually a humorous encounter sparked by dialect misunderstandings but as seen in the first video below, there's something darkly frustrating about people speaking the same language but still unable to communicate. 

http://youtu.be/SGxKhUuZ0Rc

This video of John Barrowman is super bizarre: http://www.youtube.com/watch?v=FtDg23G1uc8. He flip flops between a vaguely British, subtle and strong Scottish, and an American accent. The whole series of interview bits (20+) is about how he keeps his strong Scottish accent under wraps when speaking to non-Scots.