There are only about six people in that Chinese army pic. Pick out a face and then scan half a dozen faces to the right and I bet you'll find it again. Same goes for the sea of bicycles - there are a lot of duplicate sets of handlebars, so unless there's some major coincidence then my money's on photoshop for that one too.

I've seen a few of these pictures before in stupid emails that come from coworkers. The funniest ones are when the subject is something like "The best photographer in the world took these" or "Unbelievable photographs" and they're watermarked with Worth1000.com in the bottom corner. I have one coworker that refuses to believe that the pictures aren't real even after I showed her that worth1000 is a photoshop contest site.