Anskum-pattern plasma grenade

The Covenant Plasma Grenade is similar to the UNSC hand grenade in that it is a thrown anti-infantry and anti-vehicle weapon.

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A spartan primes a Plasma Grenade.

Function

The Plasma Grenade sticks to targets and is impossible to release. It has some kind of internal mechanism that allows it to distinguish between targets and inanimate objects. For example, it will stick to a soldier or vehicle, but not a tree or wall. It has a three-second fuse that is activated after it sticks to a target or otherwise comes to rest. In the most recent update in Halo 2, the Plasma Grenade has an instant kill effect if it goes off at the base of the target's feet (Does not have to be stuck) possibly because Plasma has the ability to melt through metal and would thus cause lethal damage even to a Spartan in MJOLNIR armor.

It should be noted that prolonged exposure to the radiation emitted by plasma grenades can cause a deviation in the neural electric pathways of the user--a disorder called Boren's Syndrome, which in one case renders them immune to infection by the Flood.

Theories

The plasma grenade may stick by producing in a thin layer of plasma which, when in contact with a target, fuses to the target. The reason the plasma grenade sticks to vehicles and characters may be due to an ability to sense heat. Since a "dead" wall doesn't emit heat, characters and the heat from vehicles engines causes it to stick.

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A plasma grenade explosion as seen in the Halo 3 Beta.

Alternatively the reason a Plasma grenade sticks may also be due to the build up of electrostatic charge as the grenade is thrown through the air. The built up of static will cause the grenade to stick to ungrounded targets such as vehicles and people, but not grounded objects like trees, buildings, or the thrower (while grenade is still in hand).

Trivia

• In Halo 2, when the Covenant use Plasma Greneades in battle, they will shout phrases as they throw them, such as "cleansing flame" and "holy light". This is similar to their belief of Halo.
• In Multiplayer, if you stick an enemy with the plasma grenade the Grenade Stick!File:Grenade Stick.JPG medal is awarded.
• In Halo 3 Beta, it seems that when a plasma grenade is stuck, it emits a high pitch sound before exploding.
• Often times, when an NPC is stuck, they will have some type of reaction to being stuck.
• Occasionally, it was easer in Halo: Combat Evolved, in if two plasma grenades are thrown in succession at the same spot; one will detonate, launching the other into the air. The airborne grenade will explode in mid-air, causing a 'fireworks' effect.
• If you stick a charging Hunter with plasma grenade the Hunter will instantly turn around, exposing its back, when the grenade explodes.

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Sergeant Johnson panics after being stuck with a Plasma Grenade.

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Tricks

• after shot of charged plasma shot from a plasma pistol when cooling tap the grenade button twice and throws two plasma grenades in 1 sec.
• can launch a gren by throwing 1 by another and launches it farther than can be thrown.