A diving crew took to Lake Saarijärvi in Finland to film a mind-blowing series of antics on the bottom-side of the ice covering the lake. The divers scooped and hauled air in a wheel barrel, went sledding on the ice, and even drilled a hole and did a little "ice fishing".

At times it is hard to remember the divers are actually upside down, walking on the underside of the ice covering the lake. Take a look for yourself!