Quite literally. Walking over Waterloo this statue appeared one day.
It was not for a couple of days that I noticed several more atop various office blocks and buildings of the South Bank Centre.
Then a couple of days later I spotted several more on rooftops on the North end of the bridge.
Turns out there are 31 of these statues according to the BBC. They are by Antony Gormley who did the Angel of the North and this work is entitled "Event Horizon". It tickled me.