Last month, something unusual happened in London.
JD Sports outfitted Big Ben in a North Face puffer jacket.
WHAT? The Big Ben?! The stunt got people talking and sharing like crazy, which ended up becoming a viral video.
😳 But here's the twist…
It was all a fake: a mix of CGI (animated effects) and actors on the street.
Why did it work so well? Simple: people thought it was real.