How bad a day must you be having to get so desperate for a pee that you have to squat in the street? You hide behind a car in a quiet backstreet, thinking you have got away with it only to find later that all the strange powers of the cosmos have conspired against you to choose that exact moment to have the Google Street View car pass you by, thus capturing your embarrassment for all eternity and for the entire planet to witness.
UPDATE: Perhaps not unsurprisingly Google has now removed the image. If you missed it, Alex at GoogleSightseeing kept a copy here.