But Cuban's backing almost never happened. Just 30 seconds in to his pitch on "Shark Tank," Aarstol completely froze, going silent for more than a minute. "It was embarrassing. I'm known as the ...
Mark Cuban, the billionaire entrepreneur and longtime investor on Shark Tank, has always been a fan ... Kevin O'Leary: Known as the show's "bad guy," Kevin embraces his villainous persona.