Storm conditions on the Great Lakes make them ideal for surfing, even in below zero temperatures. Toronto resident Antonio Lennert, founder and CEO of Surf the Greats, learned to surf on the ocean but discovered he could ride the waves in Lake Ontario. That led him to fostering a local surfing community, holding training sessions, and opening a store to cater to the specific needs of lake surfing. He talks to Jeyan Jeganathan about the joys and risks of surfing on a lake rather than an ocean.