The Viking berserkers were said to fight in a trance of unstoppable fury. Some historians believe this rage may have been triggered by psychoactive plants like henbane or hallucinogenic mushrooms.

There are a number of films debuting this week, but no real blockbusters. However, mystery lovers might enjoy "Trance" while "Viking Saga" is a very entertaining film that somehow flew under the radar ...

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How Viking Berserkers Entered a Trance-Like State | RealClearScience The legendary Viking warriors known as berserkers were renowned for their ferocity in battle, purportedly fighting in a trance-like ...