This really rang true for me. When I was in PT school, I was working in a clinic, and had a PT from the Phillippines supervising me. He didn't get any slang or sarcasm-and to make matters worse, we are in the heart of Appalachia!!!! It was so fun messing with him at times, and he would do the same to me, by acting like he had no clue what I was trying to tell him, and then bust out laughing at me.