Thanks to Junior G for the inspiration and (again) my children for pointing this one out to me. This thought-provoking and satirical piece demonstrates how individual differences in pronouncing words can have some nasty consequences.
'Milk' or 'Mulk' by Julian Smith.
Here is another (somewhat less confronting) clip from Susanna which shows how pronunciation impacts on language:
And another from Julia about what happens when you get it wrong while trying to speak in another language - in this case, Mandarin. This one comes from the popular television program, the Big Bang Theory,