From shredding guitars to mining diamonds, there isn't anyone on Earth quite like Jack Black. For decades, this party animal has graced our screens with unyielding enthusiasm and guaranteed fun times. Which is why it may be surprising to learn that this guy has really put himself through the wringer. Self doubt, depression, and imposter syndrome have plagued this comedic genius for decades, and although he may be a recognised funny man, who can say what truly lurks behind those eyes? Join us, as we look back at the history of Jack Black in order to figure out what has made him remain as such a Tenacious Dude.