When they make fun of me -it is usually over vocabulary or syntax. Every now and then I accidentally come up on them and hear it. It is funny both in how they do it and the response to me standing behind them while they do it. It wasn't upsetting, as the ones I have come upon have not been unpleasant and are even often the better students, but it was surprising to know they find my vocabulary odd. Many people find my syntax odd so they just join the throngs on that one.