Shatter proof glass

I don't dare say anything about how this can happen only in Chennai. It could happen anywhere, anytime to anyone. I've knocked over a glass on quite a few occasions, but last evening was quite unique, so I just had to put up this picture.

We were at the Madras Cricket Club, talking about an upcoming conference. I reached out for something (can't remember what - anyway, with what happened next, everything else was forgotten for a few minutes) but my hand brushed a half-empty Coke bottle, which then gently leaned over on to a half-empty glass of rum and Coke. The glass then, quite gently, sheared itself rather neatly at the point where it was empty and the top portion landed on the table, looking for all the world like a wrist-band or something.

The only reason I can think of for this polite behaviour of the glass is the presence of an executive from Saint Gobain's Chennai plant, who was at the table with us - when the experts are around, glass behaves itself, I guess!