And you think understanding English is difficult!! Even American have a hard time understanding their older English cousins across the puddle (charco) known as the Atlantic Ocean.
Here's an example from the animated sticom Family Guy of how English people sound to Americans.
Can you identify with that? Well sometimes, We Americans really have a hard time understanding English people. Here's a spoof (parodia) from a comedy show, showing a rude American treating English citizens as if they are speaking a foreign language.
Finally, not only do we not understand the Brits, we often say stupid things from. Here's an example from the popular American Late Night Show hosted by David Letterman. His nightly Top-10 list features the British comedian Rick Gervais, the creator of the British comedy, The Office.