* AntiClimaxBoss: Helena Markos.
* BigLippedAlligatorMoment: The German slap-dancing scene. It serves no real purpose to the plot, and it completely interrupts the ominous atmosphere.
* CrowningMusicOfAwesome: The entire score by Goblin is pretty impressive, sometimes even entering HellIsThatNoise territory.
* EarWorm: The intro to the main theme.
* MagnumOpus: This along with DeepRed is considered Argento's finest work.
* {{Narm}}: "[[Literature/{{Beowulf}} So]]! You've come to kill Helena Markos! A ha ha ha!"
** Averted in the original Italian dub [[NightmareFuel 'I'm coming, American! And let the living meet the dead, and the dead the living...']]
** Mostly all of Helena Markos' lines in the English dub are overly [[LargeHam hammy.]]
** The bat near the end of the movie. Seriously, had anyone who worked on that movie even seen a real bat?
** The first victim's name happens to be ''Pat Hingle''. It's either an unfortunate coincidence or one of the weirdest {{Shout Out}}s in the history of cinema.
*** Knowing Argento, it's most likely a ShoutOut.
** Immediately after the blind piano player is fired, he goes to... well, the Cine-Masochist described it as a "German brodance festival", and that's the only term that fits.
* {{Sequelitis}}: 1980's ''Film/{{Inferno}}'' and (to a far greater extent) 2007's ''MotherOfTears''.
* {{Squick}}: Nothing like brushing [[spoiler: maggots out of your hair.]]
* VisualEffectsOfAwesome: The set design and lighting truly seems like something out of a nightmare.