[migueldiaz]

Originally Posted by KuKulzA28

But on a more serious note... how real is this?

By the way, if you're referring to the alleged use of a "narcotic root" by the Igorot warriors during battle, it's the first time I've heard about it. If Nonoy Tan is reading this, then maybe he can shed more light on the matter.

As for a warrior getting berserk via the botanical route, I think most of us know that certain Viking warriors 'popularized' this.

And the very word itself (berserk) is derived from Old Norse of the same meaning.

Here's a quote from Wikipedia:

History

Hilda Ellis-Davidson draws a parallel between berserkers and the mention by the Byzantine emperor Constantine VII in his book De cerimoniis aulae byzantinae ("Book of Ceremonies of the Byzantine court") of a "Gothic Dance" performed by members of his Varangian Guard (Norse warriors working in the service of the Byzantine Empire), who took part wearing animal skins and masks: she believes this may have been connected with berserker rites.

In 1015, Jarl Eiríkr Hákonarson of Norway outlawed berserkers. Grágás, the medieval Icelandic law code, sentenced berserker warriors to outlawry. By the 1100s, organised berserker war-bands had disappeared.

King Harald Fairhair's use of berserker "shock troops" broadened his sphere of influence. Other Scandinavian kings used berserkers as part of their army of hirdmen and sometimes ranked them as equivalent to a royal bodyguard. It may be that some of those warriors only adopted the organisation or rituals of berserk war-bands or used the name as a deterrent or claim of their ferocity.

Still, some scholars consider the frenzied and indomitable berserker and his bloodshot eyes to stand right alongside horned Viking helmets as a "feature of later literary [works] rather than contemporary historical ones", placing the legitimacy of Icelandic sagas as historical records into question. Little Icelandic literature was recorded before the middle of the Thirteenth Century, more than two hundred years after the conversion of Iceland to Christianity. The sagas are broadly interested in history, but they are re-tellings of legend and in no way constitute a proper historical record. The family sagas in particular shed more light on 13th- and 14th-Century ideas about the 9th-11th centuries than they do on the legendary period itself.

Irish hero Setanta (Cúchulainn) is said to have been a berserker in some legends.

Theories on the causes of the berserkergang

Theories about what caused berserker behaviour include ingestion of materials with psychoactive properties, psychological processes, and medical conditions.

Modern scholars believe certain examples of berserker rage to have been induced voluntarily by the consumption of drugs such as the hallucinogenic mushroom Amanita muscaria, commonly known as the fly agaric or fly Amanita (Howard D. Fabing. "On Going Berserk: A Neurochemical Inquiry." Scientific Monthly. 83 [Nov. 1956] p. 232), or massive quantities of alcohol (Robert Wernick. The Vikings. Alexandria VA: Time-Life Books. 1979. p. 285). While such practices would fit in with ritual usages, other explanations for the berserker's madness have been put forward, including self-induced hysteria, epilepsy, mental illness or genetic flaws (Peter G. Foote and David m. Wilson. The Viking Achievement. London: Sidgewick & Jackson. 1970. p. 285).

A Horizon Book on Vikings claims[citation needed] that some chieftains would hold their berserkers in reserve during a battle. Once a portion of the enemy line appeared to tire or weaken, the chieftains would send the berserkers charging into the enemy ranks to hopefully open a break and even panic the enemy. The book also claimed that while on sea voyages close to land, berserkers were sometimes asked to go ashore to find objects on land to wrestle or bash to give vent to their fury.

Botanists have suggested the behaviour might be tied to ingestion of bog myrtle (Myrica gale syn: Gale palustris), a plant that was one of the main spices in alcoholic beverages in Scandinavia. The drawback is that it increases the hangover headache afterwards. Drinking alcoholic beverages spiced with bog myrtle the night before going to battle might have resulted in unusually aggressive behaviour.

The notion that Nordic Vikings used the fly agaric mushroom to produce their berserker rages was first suggested by the Swedish professor Samuel Ödman in 1784. Ödman based his theory on reports about the use of fly agaric among Siberian shamans. The notion has become widespread since the 19th century, but no contemporary sources mention this use or anything similar in their description of berserkers. In addition, the injection of bufotenine from Bufo marinus toad skin into humans was shown to produce similar symptoms to the "Berserker" descriptions. These findings, first examined by Howard Fabing in 1956, were later linked to the induction of zombie characteristics by ethnobotanists in 1983.

A simpler theory attributes the behaviour to drunken rage. It is also possible that berserkers worked themselves into their frenzy through purely psychological processes, perhaps using frenzied rituals and dances. According to Saxo Grammaticus they also drank bear or wolf blood.

Parallels in other cultures

Among the Irish, Cúchulainn acted in the 'battle frenzy', or 'contortion', and many other famous Irish warriors from the pre-Christian period became possessed and frenzied. They are described in texts such as The Tain as foaming at the mouth and not calming down after battle until doused with cold water.

Similar behaviour is described in the Iliad, where warriors who are "possessed" by a god or goddess exhibit superhuman powers.
In historical times, the Spartan warrior Aristodemus is mentioned as acting with a berserker-like fury at the Battle of Plataea, to redeem himself from accusations of having acted with cowardice at Thermopylae.

Berzerk behavior is also similar to the Amok frenzy described among Moro tribesmen in the Philippines and among other tribes in Malaysia.

It's a long read but I thought it was interesting.