Ooops!. The Big Bus Challenge is a fun competition where the brief is to 'show off their skills with some brilliant Bus advertising', using the scale and shape of bus ads. The winning entry for the client Compassion in World Farming by ad agency Elvis Communications visually crammed sheep into the bus to remind us all that while we might think our commute stinks, animals have it far worse.
Which is all good, except WSPA already did exactly that back in 2008. On buses. And it was noticed.