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- Bleach. During "The New Captain Shūsuke Amagai" anime arc, several people have this while wielding Bakkōtō blades, including the assassin Hanza, Captain Amagai's father and Captain Amagai himself.
- In Rebuild of Evangelion, Shinji and Unit-01's awakened upgrade against Zeruel comes with this.
- Fairy Tail: Natsu when he has a ball of fire in his mouth.
- Naruto: The Tailed Beast V2 forms have bright-white glowing mouths, Glowing Eyes of Doom included.
- Mister Ajikko, a shonen anime about cooking, commonly abuses this effect to describe incredibly good food. With no hint of parodic intent in sight, to boot.
- The Visionary from Sentinels of the Multiverse has at least a few cards depicting this. "Precognition" shows her emitting a glowing smoke from her eyes and mouth while the background shows a Bad Future, and Mind Spike depicts her blasting one of the villains with pure psychic energy, some of which leaks out the villain's face.
- Finnegan from Witchblade (pictured above) when he's infused with the Elemental Powers of Ice... which somehow also causes blue Volcanic Veins thanks to Power Crystals.
- In The Order of the Stick prequel book Start of Darkness, Redcloak has light pouring from his eyes, throat and holy symbol the very first time he puts on the Crimson Mantle.
- Shinomura from the Godzilla (2014) tie-in comic Godzilla Awakening has a blue glow in its mouth.
Films — Animation
Films — Live-Action
- In Batman Begins, when the city is hopped up on fear gas and they get a look at Batman, he's basically a bat-demon with a hellfire inner glow.
- Big Trouble in Little China. When in his ghost form, David Lo Pan can send a blinding light out of his mouth and eyes.
- In the Swedish cult slapstick comedy Drömkåken, one of the bad guys attempts to cut a chain with a chainsaw, but the chain happens to be conducting electricity. The resulting Harmless Electrocution lights up his mouth in addition to messing up his hair.
- The creepy alien angel guys from Knowing, whose creepiness is upped by their only apparent communication being opening their mouths and emitting a light and a wail.
- In The Lord of the Rings films, the Balrog has this. It is also glowing from various cracks in its skin, the implication being that it is simply a giant flame in demonic form cloaked by shadow.
- Devastator from Transformers: Revenge of the Fallen.
- The Matrix Revolutions. This happens briefly to Neo at the end as the machines channel their power through him to destroy the Agents Smith, as well as to the Agent Smith that possessed the Oracle.
- Ghostbusters (1984). While Dana Barrett is looking into her refrigerator she sees one of Gozer's demons. The demon opens its mouth and a light comes out of it.
- This happens to Extremis soldiers in Iron Man 3 before they blow up.
- In Pacific Rim, most Kaiju have a bioluminescent version of this. Their power lies elsewhere in comparison to most examples here, however.
- White light spews from the mouths of those replaced by aliens in The World's End.
- The villain in Cradle 2 the Grave gets a radioactive pill caught in his throat, burning him from the inside as light pours out of his throat and eventually his eyes.
- The Wheel of Time has Ba'alzamon, whose mouth (and eyes) looks like endless caverns of flame when seen directly. This is a result of his overuse of the True Power and according to Word of God as sign that it has consumed him so thoroughly that he'd die if he hadn't been granted immortality by the Dark One.
- In the Second Apocalypse books, the throats of sorcerers glow with light when they recite their magical cants.
- In I, Jedi, when Corran opens himself fully to The Force for the first time, he finds it amazing, incredible, and says that he was completely filled with its power, which spilled and flowed from his eyes and mouth.
- In the Old Kingdom books by Garth Nix, Free Magic sorcerers flame from their mouths, eyes, fingernails, etc. as they cast, and get that way more and more, the more Free Magic they use, until they wind up as masses of flaming Free Magic. They appear to be fine with that.
- In Memory, Sorrow and Thorn, the Storm King possesses a victim at the climax in an attempt to return to life. One of the symptoms of said possession is a deep reddish light coming out of the victim's mouth.
- CL Moore's story "Daemon" has this passage:
I saw the flaming thing descend upon the captain like a falling star. Through his defending arms it swept, and through his flesh and his bones and into the hollows where the soul dwells.
He stood for an instant transfixed, motionless, glowing with that bath of crimson light. Then I saw the crimson begin to shine through him, so that the shadows of his bones stood out upon the skin. And then fire shot up, wreathing from his eyes and mouth and nostrils. He was a lantern of flesh for that fire of the burning spirit. But he was a lantern that is consumed by the flame it carries...
- A Goa'uld torture device in Stargate SG-1 causes this effect on the victim.
- Jim Staal had a recurring character on... some Sketch Comedy show, possibly Big City Comedy, where he was the Anthropomorphic Personification of your refrigerator (and EVIL!), who had a light in his mouth whenever he spoke.
- Doctor Who: The Doctor does this when he regenerates (transforming from one actor to another).
- "Kingdom" by Dave Gahan.
- "Pyromania" by Cascada has throat strobe lights.
- "Ich tu dir weh" by Rammstein features frontman Till Lindemann using this trope with full force. They did this by piercing his cheek and inserting an LED light. Throughout the video, the wire coming out of his cheek is visible.
- He also wears the light while playing live.
- A common look for daemons in Warhammer and Warhammer 40,000, and the part-daemonic Dark Eldar Mandrakes in the latter (those with mouths anyway - Mandrakes tend to have featureless smooth faces that manifest either glowing eyes or just this kind of mouth, but not both. Though their infernal inner glow also shines out from slashes and carved runes in their flesh - which is jet black to emphasise the contrast).
- Happens in Werewolf the Forsaken, among the adherents of the Temple of Apollo. When on their Sacred Hunt, if the target has trespassed in one of their holy places and once the adherent uses enough abilities towards their prey, Apollo's power pours through the werewolf. Light spills from their mouth and eyes, granting them a number extra advantages and lighting up the area.
- In Recettear: An Item Shop's Tale, this happens to Arma when she's being hacked into and taken over remotely or displaying a warning.
- In Dead Space 2, Isaac's recurring hallucination of Nicole has bright white light pouring out of her eyes and mouth.
- In Panzer Dragoon Zwei, Khourieats, a lizard-like animal used for riding and carrying, are killed by imperial decree if they develop one of these. Our hero Lundi decides to hide his because its forelegs mutated into wings as well (and that's just too cool to simply kill off). As it turns out, the light is a manifestation of their Homing Laser Breath, which The Empire didn't want getting out.
- In a variation, this happens in Deus Ex: Human Revolution to the Final Boss when they overload and burn up from the inside.
- In Starcraft II Heart Of The Swarm, Kerrigan finally disposes of Arcturus Mengsk in such a manner. She channels a portion of her immense psionic energies into him; far more than his human body is capable of holding. First, his eyes glow, then this happens, and then he turns into a giant explosion that takes out the wall he's standing next to.
- The Boys of Silence in Bioshock Infinite do this. They were huge brass helmets with no eyes and a gaping mouth that spews white light, to act as living security cameras in Comstock House. The light changes color if one sees you, and if it goes red, they emit an ear-piercing scream to alert the nearby lunatics.
- Deliberately invoked by Big Ears in Goblins to scare off a crowd of human civilians, by putting the Axe of Prissan through his head and aligning the glowing yellow orb on top of the magic weapon with his throat. Behold.
- Girl Genius: The "Fun-Sized Mobile Agony and Death Dispensors" (a.k.a. Devil Dogs) of Castle Heterodyne have this going. Not so much of a Power Glows example, though, since they're clanks.
- The Joueur du Grenier special about cartoons for boys ends up with a review of the Mister Ajikko anime, mentioned above, and comments about the exaggerated effects. Then JdG says "Imagine if the slightest thing you'd eat would make you—" while eating a bit of chocolate. Throat Light ensues, and then the Earth explodes.
- Avatar: The Last Airbender
- Aang while in the Avatar state.
- As well as Lord Ozai in the final episode, while Aang remove his firebending powers with energybending. Here, said Throat Lights are reaching Pillar of Light level.
- Puck, when he casts a spell, in Gargoyles.
- Raven from Teen Titans does this in the episodes "Spellbound" and "The End" parts 1 and 3.
- Predaking in Transformers Prime, before unleashing his Breath Weapon.
- Jack O Lanterns.
- Till Lindemann of Rammstein now sports a lit mouth as of the video for "Ich tu dir weh". It's removable, but he got a cheek piercing specifically for the purpose of wiring it.
- It is possible to get glow-in-the-dark braces.