In I Am Legend, in the scene when Will Smith finds Fred the mannequin on the bridge and wants to know what he's doing there. When he shoots the mannequin and it falls to the floor it then looks like it's chest goes up and then down like it just breathed in and out, Is it just my eyes deceiving me or is that supposed to happen because it's the film makers way of showing you that it was infact a dark seeker / zombie and not a mannequin after all?
Never noticed that. I just thought, he placed the mannequin's around to stop himself from going mad as he was the only real person around. Found the film to be quite boring.