It could even be a new extreme sport.
On 24 January, László Bajza swam 27 meters under the ice of Kavicsos Lake in Mezőkövesd, Eastern Hungary.
The 41 years old man – who is a professional diver at the fire department – wore only swimming trunks in the water.
Bajza is a real Iron Man.
Earlier he had ran the Budapest-Vienna distance more times, and also ran in the extreme hot (40 Degrees Celsius) Sahara desert on his own.