We here in Central New York know all about the cold and ice on water. Those smart enough to know where to walk on icy lakes will ice fish - except the goal is to ALWAYS stay above the ice and the icy waters. Not this guy, who is filmed at a place called Lake Milada in the Czech Republic. Wearing only a Speedo, he dives right in under the ice and swims. Later, it appears he is skating on the lake near another swimmer. It makes me cold just watching them!