Radiation always has a Sickly Green Glow note In real life most radioactive materials just look like any other metal (because dangerous ionizing radiation, by itself, is completely invisible).This is why wars were fought over control of things like indigo flowers and lapis lazuli before the invention of synthetic pigments. Intense color is rare, found only in certain crystals, organometallic compounds, complex organic molecules, and metallic oxides. Technicolor Science: All chemicals are brightly colored note in reality most chemicals range from clear to a milky grey-brown, only a handful of common laboratory chemicals have any sort of color at all.Every cockpit must have Billions of Buttons.Mainframe hackers had 'green lightning' (or 'compatibility logic' when the suits were around) named after an Ascended Glitch in an IBM terminal monitor left in so people would think the computer was 'doing something'.This trope does not apply exclusively to sound, but to any instance of an element that is used simply because the audience, consciously or unconsciously, expects it to be included, and/or because Stock Visual Metaphors allow writers to avoid long expositions via Show, Don't Tell: The Stuka Scream is a common example of this when planes are seen on screen.Beeping Computers and Pac-Man Fever cover the standard sounds of modern technology and interactive entertainment.

On loose surfaces like gravel, grass/soil, sand, snow, and so on, tires simply cannot squeal. Squealing tires are Truth in Television when a car is driven at or slightly beyond the very limits of the tires' performance, but only on hard surfaces that provide enough friction, such as paved roads.

Car and driving noises: 'Wildest Police Chases' / 'Wildest Security Camera Video'-type programs are big on this squealing tires and crunchy crashes are all dubbed in after the fact in cases featuring security camera footage, which rarely features an audio track.

All bullets in movies, regardless of caliber, will often make 'zzzzip!' or 'ffffIn truth, a bullet whizzing past you would sound more akin to a small firecracker going off than anything else.

Nevertheless, most of us would think there was some sort of issue with our audio if we saw Captain Space, Defender of Earth! fire an energy pistol that didn't make any noise, hence this trope. In reality, a laser is basically just a precision variation on the common flashlight, and as such makes no more noise than one. While there's a wide variety in the way they actually sound, 'pew' is usually a pretty accurate onomatopoeia for anything short of a Wave-Motion Gun.

Any 'aerodynamic' missile (from arrows to throwing knives or poisoned dart) must make a distinctive 'fssshhh' when traveling through the air.

Depending on the surface, it can sound more like a game of basketball than fisticuffs. Real-life fistfights tend to be eerily silent, which obviously wouldn't be very dramatic or exciting (and more than a little creepy.) The only noticeable sound in a fistfight is feet tapping or sliding. note This is one of the reasons slapstick comedy got its name: The slapstick was two sticks that, when struck together, sounded more like a 'slap' than an actual slap did.

Kung-Foley: The 'whump' of a person getting punched in the face, or the exaggerated smack of a boxing glove.

The Audible Sharpness of a sword being drawn from a scabbard or a knife being waved around.

Real recorded hoofbeats on later, more sophisticated productions sounded 'wrong' to test audiences (or more likely, clueless producers). Nevertheless, filmmakers and radio producers stuck the coconut sound on the audio track even when the horse was on grass or gravel (rarely even in synch with the movement of the horse) until audiences came to expect the specific audio cue.

However, it's fair to say that the vast majority of depictions of horses are upon dirt, grass, or other unimproved terrain where the sound would be muffled to inaudibility. when the horse is walking on cobblestones or some other hard pavement.

Horses hooves do sound like a pair of coconut shells being tapped together. The trope namer is the traditional foley effect of using hollow coconut shells to recreate the sound of horse hooves in theater, and later radio, film and television. The Coconut Effect describes any sound effect, special effect, or design feature that is unrealistic, but still has to be included because viewers have been so conditioned to expect it that its absence would be even more jarring.

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