A promotional shirt for Resident Evil: Darkside Chronicles. Looks like an ordinary and rather plain t-shirt, right? But flip over the front and pull it over your head....
And you're wearing a zombie mask! Strangely, they don't make this shirt in a women's style.
I'm thinking that Neatorama needs to create one of these. Neatorama logo on the front, flip it up, and you're wearing an Alex mask.
Link via Topless Robot