Raph starts fighting his ninja turtle brothers when he mistakes them for giant roaches! Turns out Raph, April and Casey have been exposed to toxins in fungi, causing them to see their biggest fears! Mikey, Donnie, and Leo have to figure out a way to stop the fungi from going all over the city! Watch what the turtles do in this full scene from the episode, "Fungus Humungous" from the 2012 series, Teenage Mutant Ninja Turtles!

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