Fright Deathtrap

Murder Is the Best Solution; sadly, it's not always practical or possible to simply shoot the target. Either because they want to avoid being incriminated in the murder or have no corporeal body, the murderer will use a Fright Deathtrap to figuratively and literally scare someone to death. The Fright Deathtrap consists of scaring someone at just the right moment so they end up dead in circumstances that Occam's Razor will imply was an accident rather than foul play or the supernatural.

This usually requires a bit of set up, though; the murderer has to know the victim's routine, surroundings, and/or reactions well enough to manipulate them into a nearby danger, often one they have to identify or place themselves. For the sake of The Perfect Crime, it should be something that was always there, but a harmless gift (or abandoned object) serves just as well if it's in a place that can help kill the victim.

A few common variants:
 * Deadly Fall: Scaring a person at the top of a staircase so they fall and break their neck.
 * Run to your doom: Scaring a person into fleeing into a deadly trap, oncoming traffic, or another enemy. Often, they'd have lived if they simply stayed put or moved slowly.
 * Deer caught in headlights: Scaring a person motionless so that they ignore or fail to dodge or escape an approaching danger or falling object.
 * Scared Stiff: The victim is in such poor health, either mentally or physically, that the shock of a good scare itself may be enough to push a near-fatal condition over the edge.

This isn't anywhere near foolproof, of course, and runs the risk that failing to scare the victim into a Fright Deathtrap puts the thwarted murderer out in the open. If he could die a second time, a ghost might die of shame at being as ineffective as a Peek a Bogey Man. The would-be victim now knows someone (or thing) is out to get them. ...Unless the would-be murderer used a spring loaded cat as the scare. Then again, maybe the murderer was going for a long-term frightfest...

Anime and Manga

 * In Higurashi: When They Cry, during the last part of an arc, Mion is hiding under Keiichi's hospital bed, waiting for a chance to attack him when he's alone. But, much as it is a surprise to say,

Comic Books

 * A standard tactic for the Scarecrow in the Batman comics.
 * Used in Ramba when she is hired to kill a mob boss and make it look like natural causes. She breaks into his doctor's office and learns that he has a weak heart. She then breaks into his bedroom and throws a knife at him. The knife is tied to a string around her wrist and stops short of his chest, but the fright triggers a fatal heart attack.
 * In the Golden Age, heroes occasionally did this, although usually unintentionally. The original Green Lantern (Alan Scott) terrified a villain into confessing  - and then the villain drops dead of a heart attack.

Film

 * In Ghost, the protagonist scares one of his murderers into running onto a busy street. The man gets hit by a car and then dragged to hell by living shadows. The hero still gets to ascend to heaven after disposing of the other murderer (who also died without direct action on Sam's part).
 * The Run to your doom variety is used frequently in Young Sherlock Holmes, as several elder gentlemen are drugged with blow-darts, causing them to see terrifying hallucinations and run into traffic, leap out 3rd story windows, etc.
 * In the film and play Death Trap, is literally frightened to death after witnessing a staged murder victim return from their grave.  collapses from a fatal heart attack, and the conspirators shake hands over the body.
 * The last variety occurs in Les Diaboliques.
 * In The Tingler, the theater owner's mute wife is frightened to death while alone in their apartment - hints suggest it may have been the work of but it turned out to be the work of

Literature

 * In a definite Crowning Moment of Awesome, does this to Lord Winder in Night Watch. The Properly Paranoid Winder is expecting to be poisoned or otherwise assassinated, and his nerves are so on edge that a simple "boo" causes him to die of fright.
 * How Sir Charles Baskerville was killed in The Hound of the Baskervilles.
 * Agatha Christie does this a few times, though she's just as likely to subvert it:
 * In "The Blue Geranium", a woman is told by a fortune teller, "Beware the full moon. The blue primrose means warning, the blue hollyhock means danger, the blue geranium means death." At the next full moon, one of the primroses on her wallpaper turns blue, and at the full moon after that, one of the hollyhocks turns blue. The woman dies of a heart attack on the night of the third full moon, with the implication being that she was frightened to death by the threat.
 * In "The Case of the Caretaker," a woman dies when her horse is frightened by the aforementioned caretaker, causing the animal to rear and the woman to fall off.
 * John Dickson Carr's locked room mysteries, which might be called "howdunnits", included a couple like this, where the mystery was largely just how the victims had been scared to their deaths.
 * In The Case of the Constant Suicides, everyone who stayed in a certain room in a castle for a night would wind up falling down to their deaths from the dangerous balcony, as if something scared them into attempting to escape. There was nothing special in the room aside from a box with a cage door such as might be used to carry a small animal that had been brought in recently and left under the bed—but which people had looked into and found it to be empty.
 * In He Who Whispers, just after it has been suggested that one of the characters is a vampire and was able to commit a previous impossible murder by flying, a shot is heard, and one character is found in her bed scared so badly she has nearly died (and is incapable of explaining what has happened, of course). She's holding a gun and appears to have shot at something ouside the window, which is, of course, so far above the ground and inaccessible that only something flying could have been behind it.

Live Action TV

 * Night Gallery episode "The Ghost Of Sorworth Place". A ghost appears near the top of a flight of stairs. A man pursuing the ghost tries to grab it but falls through it and down the flight of stairs, breaking his neck.
 * Attempted in one episode of Randall and Hopkirk Deceased by a ghost villain, who appeared in the middle of the road while his target was driving. But his target knew he was a ghost and just drove straight through him.
 * The Scared Stiff variant is attempted in an episode of Monk, where someone wants to keep the Worlds Oldest Man from reaching his next birthday.

Radio

 * The Shadow adores this trope. He uses his powers to cause hallucinations that make the villains kill themselves or their partners, or just freaks them out so badly that they're driven to do something suicidally stupid.
 * In "The Three Ghosts" the villain is trying to do this to his wife, and apparently did it to his last one.

Video Games

 * Silent Hill starts this way (both the game and the movie). Harry swerves to avoid running over a woman in a schoolgirl uniform and crashes into Silent Hill. Tellingly, Harry fails to avoid her, and though she braces for the impact she shimmers like smoke after the jeep goes through her.
 * In Illbleed, many of the traps are meant to scare the target instead of physically injuring them. Your character will die of shock if their heart rate gets too high.
 * In an example of Run to your Doom, World of Warcraft has the infamous "Fear" spell available to Warlocks (And a myriad of other Fear inducing spells and abilities available to other classes)-- it finds its biggest use in PvP where it can be used to... well, in a way, scare the other player's character to death.
 * Subverted if the feared object actually is a PvE monster running around and alerting nearby monsters so they join the battle, eventually killing the warlock (or whatever) and his whole group instead.
 * The Elysian Box in Professor Layton and the Diabolical Box seems to function this way. Rumors surrounding the box say that it kills all who dare open it, and the game begins with the death of Layton's old mentor while investigating the rumors.

Western Animation

 * The 1999's Disney short "How to Haunt a House," from House of Mouse: at the beginning, we hear Goofy getting hit by a car so that he can be a ghost and demonstrate how to haunt a house, with Donald Duck as the hauntee. After many amusing attempts that end in failure, he finally succeeds in scaring Donald, who runs out the door, is also hit by a car, and comes back inside as a rather angry ghost.