A very interesting experience. One of my relatives recently called me stone-headed, but in a very elegant and sophisticated manner. I was visiting him (only reluctantly) with some of my other cousins, and I did not utter a word during their conversation. So while showing me out, this guy points to what looks like a tree stump and says, "And here's something of special interest to you...". So I guess its petrified wood, and to my unbounded amusement, I realise what he's implying.