I think this is a secret but the fnaf animatronic thing with the bloody handprint is a reference too the first incident in Freddy fazbear's pizzeri, where one of the 4 animatronics(chica, foxy, freddy and bonny obviously) bit off a kid's frontal lobe, it said freddy had a handprint, on his forehead looking like someone was fighting back, the reference could mean freddy has done it