From murders to terrifying fires on-set, the most uncanny real-life incidents that occurred while filming the biggest horror films have been revealed. RadarOnline.com can reveal all the behind-the-scenes details about the scariest accidents to happen to both the cast and crew members over the last few decades. ‘The Exorcist’The 1973 film is known as one of the most famous horror films of all time. The film is about a mother dealing with her daughter’s mysterious ailment, which ends up being a demonic possession. She seeks help from two Roman Catholic priests, who attempt to perform an exorcism…