Bubbles

The meeting was on the 13th floor of the Medical Research Council building in Covent Garden, London. The weather flickered between bright sunshine and cloudy.
The view was eminently blippable. London Eye! Palace of Westminster! Center Point! Thames House, Headquarters of MI5! (if you're a Spooks fans, that is, which you should be - in reality, Freemasons' Hall.)
Then I saw a glass of sparkling water and its shadow on the table...