the one thing Google does badly
Google's great at a lot of things... but Google's not a great doctor. Seems pretty obvious, yet millions of people look to Google to diagnose their medical symptoms, only to lost in a abyss of incorrect (and potentially dangerous) information. And, if you know anyone with hypochondriac tendencies, then you know it's a slippery slope into deep paranoia from there.
Belgian medical site, Gezondheidenwetenschap.be, wanted to put an end to this madness by reinforcing the importance of getting correct medical information. To do that they bought a bunch of symptom related adwords and served up these videos to diagnosis seekers.
The videos themselves are a bit campy, but the concept is right on.