Kevin O’Leary, ‘Mr. Wonderful’ on Shark Tank, got emotional while recalling a business deal that went wrong during a taping of the show. He revealed that Mark Cuban saved him from a potential loss of $500,000. O’Leary explained that he had invested in a company, but the deal fell through when the founder passed away unexpectedly. Cuban, who had also invested in the company, offered to buy out O’Leary’s shares at cost, saving him from a significant loss.