William Peter Blatty took on the directing reins for the third film in the series. I’m going to take a huge leap of faith that he was none too happy with how the first sequel turned out.
The latest “Scenes I Love” the Horror Edition comes from Blatty’s The Exorcist III and it’s actually a very effective jump scare that truly comes out of nowhere. I chose this particular clip because of how well Blatty frames and sets up the pay off. Some may argue that this third film in the series was a mixed bag but one thing it had was genuine scares making up for not being as disturbing as the first film.
I recommend watching this particular scene in a darkened room with headphones on to better appreciate the sound.
Through the Shattered Lens 
That scene shows the power that a skilled director can generate by taking his or her time to build up to the pay-off. It’s as if there was an unseen spring being slowly but constantly stretched to a very high tension, and it was then “sprung” at the same time it suddenly appears to the viewer.
“Exorcist III” was surprisingly good, and is certainly underrated. It had those genuine scares you mentioned and a creepy feel throughoutt. Having George C. Scott in the lead role didn’t hurt, either.
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