Again a story from the first days at work. When we joined we were about 150 together, divided into 5 batches of 30 each. I made friends with some and one day we were in the cafeteria to catch our lunch. We got settled in a table and the chair opposite to me was vacant. As fresh recruits, we were scanning all around in an effort to increase our "network". While we were gladly scanning and having lunch, the unstoppable happened.
This tall guy, from our own batch, whom we are yet to be friends with, comes and sits on the chair opposite to mine. I got so irritated and told my friend in Malayalam "What is this block officer doing here, blocking all our views". He never seemed moved by the comment. We too were not bothered, as we thought the guy did not know Malayalam.
Later, when we got introduced we knew that he is a Malayalee, born and brought up in Rajasthan, but speaks and understand Malayalam. It wasn't too much of an embarrassment for us, as he was very friendly and we had already made friends with him.
Moral : Appearances can be deceptive.