How realistic is the film The Exorcist'?

How realistic is the film The Exorcist'?

Michele Kennedy (Exorcist) gives expert video advice on: How do I find a reputable exorcist?; How realistic is the film The Exorcist'?; What's the scariest exorcism you've done? and more...

Parts of the film 'The Exorcist' are realistic and parts are basically sensationalist, like the head spinning around. Realistically, people do have parts of their body that become contorted into odd positions or they may find that they speak in odd voices. Those aspects are based in fact. You have to take the rest of 'The Exorcist', like the head spinning around, with a pinch of salt. It's a Hollywood thing.