We have to give credit to the advertising agency that came up with this clever advertising campaign. Warner Bros. launched an ad campaign to advertise its new shooter game, F.E.A.R 2: Project Origin, which saw quite a few black cats wandering around the city of London on this past Friday the 13th.

Branded a "cat-vertising campaign", specially trained black cats were seen around London sporting F.E.A.R. 2 clothing. According to Warner Bros., the idea is that the cats would "capture the attention of superstitious passers-by" on the notoriously unlucky Friday the 13th.

Explaining the campaign, a Warner Bros. spokesperson said that "everyday people are bombarded with so many advertising messages that it can be easy to miss them. With our research telling us that Brits are actively looking out for signs of bad luck this Friday, it makes perfect sense to try and capture their attention that way."

Another interesting twist to the ad campaign was that cat owners could join in the fun and order some F.E.A.R. 2 Project Origin cat shirts of their own. They have since run out of the cat shirts.

Now the question is, will "catvertising" start popping up in the U.S., perhaps in a big city like NYC?

Here are some more photos of the cute and creepy felines: