I've been seeing this video circulating lately: The narrator suggest that the red item is blood/gore and it disappears as soon as the guy walks in front of it. So... ABC forgot to render back in some gore, right? Turns out if you watch closely you can see it being pulled away(or perhaps blown in the wind) a frame or two before the guy passes in front of it. It appears to be some sort of fabric material. The "strange object" is there the entire time. I think it's safe to say this is debunked.