Beijing Olympic 2008 opening ceremony giant firework footprints 'faked' – Telegraph

As the ceremony got under way with a dramatic, drummed countdown, viewers watching at home and on giant screens inside the Bird’s Nest National Stadium watched as a series of giant footprints outlined in fireworks processed gloriously above the city from Tiananmen Square.
What they did not realise was that what they were watching was in fact computer graphics, meticulously created over a period of months and inserted into the coverage electronically at exactly the right moment.

Check it out here.