Bananas contain radioactive elements.
Bananas contain potassium, which decays and makes them mildly radioactive, making them one of our weirdest scientific facts. But this is one of those amusing science facts about which you need not be concerned. According to Forbes, you’d have to consume 10,000,000 bananas all at once to die of radiation exposure.
While filming Goku's Super Saiyan level 4 transformation for Dragon Ball GT, Sean Schemmel passed out.