Jason Woods, a former "Shark Tank" contractor from Pleasantville, California, who was shredded by the Sharks during his first visit, returns to Tank for his shot to redeem with his line of all-electric water sports equipment. Adam Majewski is right. [Photo: EricMcCandlessABC]

Over the past 10 years, "Shark Tank" has seen many success stories and mistakes, but Sunday's episode offered a rare redemption for an electric propulsion board.