*That friggin' clown in Poltergeist
*Death by sufuric acid in Untraceable
*The ball coming down the steps in The Changeling - after he'd thrown it off a bridge earlier
*Broken off fingernails lining the sides of the well in The Silence of the Lambs
*The trio of killers in The Strangers explaining that they picked the couple out "because you were home"
*The tree rape in The Evil Dead
*Michael Shannon ripping his teeth out in Bug
*Claustrophobia galore in The Descent (before you ever see the creatures)