Members of a Russian winter swimmers’ club went for a swim into the Yenisei River, at a temperature of around -36 degrees Celsius.

Russians are no strangers to cold, and most of them cope pretty well with it, especially after a few shots of vodka, but under -35 degrees is extreme, even for them. Winter swimming is very popular in Russia, and the ritual of the Epiphany has thousands of people bathing in ice-cold water to purify their bodies, but this particular group of swimmers, from the Siberian city of Krasnoyarsk, did it simply for fun. That’s right, they stripped down to their bathing suits and dived into the Yenisei River at -36 degrees Celsius, because that’s what they call a good time.

In case you were wondering, they all survived this crazy stunt, which means they’ll probably survive the next ice age.

Photos by REUTERS via Toronto Sun