I was driving yesterday and messing around with my iPhone 4 (whilst in traffic). I was fiddling with the camera and a message popped up saying something along the lines of "turn to landscape to start augmented reality mode". I made a note to have a look when I got out the car but forgot, and now for the life of me I can't seem to find this feature again. I'm reasonably sure I didn't imagine it but am now starting to doubt myself. Any help?!