Italian ad agency Enfants Terribles specialises in viral advertising. And to practise what they preach, the company's business cards are printed on lab slides and feature a fake company name — Ebolaindustries — and pseudonyms for all its staff, like Mrs Grey.
If you want to know Mrs Grey's real identity, you'll have to place the business card under a real, working microscope, where her actual name has been printed smaller than can be seen with the naked eye. Maybe a little annoying if — like everyone else on Earth who isn't a scientist — you don't have a microscope at your desk. But a clever idea that's successfully spreading the company's work across the internet — in what some might call a 'viral' fashion.