In 1800, Alexander Von Humboldt conducted a cruel experiment regarding Electric Eels and horses whereby horses were herded into a remaining small pool, caused by the dry season, where said trapped eels were residing. Needless to say, the eels defended themselves forecefully by leaping out of the water and discharging lethal jolts of electricity to the trapped horses, with one of the them dying as a result. These findings were scorned, until now.
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Intense says it all.