Sorry...pip-foot..🙁 But I'll side with Thor here..In the movie..Frodo really did turn around when he was hearing some noises...but while we as audience were already seeing Shelob's head sneaking in so that she could sting Frodo already...(while we were saying.."OMG!! Frodo..turn around..turn around!! WATCH OUT!!!!)...Frodo indeed turned around to see Shelob...but it was too late..and Shelob stung him...IN FRONT. Above the mithril territory of protection...(if there's such a location..😛 ) But you know what I mean..😛