How, exactly, do you expect the unexpected?

Today I did another thing I didn't expect to do whilst in Germany: giving a seminar on cockney rhyming slang to a group of teaching students. Bizarre. I'm clearly no authority on the subject, coming from the wrong part of London, but even with the dozen or so examples i could come up with, I managed to totally baffle everyone. I've never seen my class so confused. The class teacher really enjoyed it though, she got really into it. As I left the classroom after I'd finished, she said to her students, 'right class, now let's have a butchers at these handouts..'. A thoroughly surreal experience.