There is one shot in the Exorcist III that will make you jump out of your whatever you are sitting on even if you if you have seen it before, it's not so much a jump scare (though it is that) but it's also perfectly composed.

Blatty used to work as a Political cartoonist and it shows with many of his shots.

The scenes (all in one fixed camera shots) where an asylum inmate dressed as a nun is exorcising a drinks machine and where a black guy dress as Superman is guarding a door into which a troop of Shakespearian actor dogs of various breeds go in right of shot followed by a man in a jet pack flying left of shot (to crash off screen) in The Ninth Configuration are other examples.