A monster created when Theta wave therapy was used cure a mans insomnia but sent him into a very deep slumber and, having suppressed for 45 years, his rage became a physical entity.
The Crackler play homage to Gabara. Oddly enough it seems that the newer kaiju Clover(the "Cloverfield" monster) may be a homage to him along with several other monsters from the series.
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