The Olympic flame plunged into Lake Baikal on Saturday. A man with a jetpack then carried it above the lake to shore.
A Sochi 2014 group dived about 40 feet into the world’s oldest and deepest freshwater lake with three special torches that can burn underwater at a temperature of 3,600 degrees Farenheit, according to Russian news outlet RT.
The Sochi 2014 website explained how the flame could stay lit while submerged:
The continuous burning of the flame during the dive was possible thanks to a special burner, which was designed and developed in a similar way to flares used for warning signals at sea. The device was lit by the unique Olympic flame using a special pyrotechnic charge.
A Russian TV anchor, the vice president of the Sochi Olympic Organizing Committee, a professional diver, an emergency rescuer and a former underwater swimmer scout for Russia’s Pacific Fleet accompanied the flame, according to RT.
The dive culminated with a “flame kiss,” as seen in one of the photos below: