I mean, there is this Icelandic guy https://en.wikipedia.org/wiki/Gu%C3%B0laugur_Fri%C3%B0%C3%BE%C3%B3rsson https://en.wikipedia.org/wiki/Gu%C3%B0laugur_Fri%C3

I mean, there is this Icelandic guy https://en.wikipedia.org/wiki/Gu%C3%B0laugur_Fri%C3%B0%C3%BE%C3%B3rsson https://en.wikipedia.org/wiki/Gu%C3%B0laugur_Fri%C3%B0%C3%BE... who actually did swim 6km in freezing waters after his vessel sank in 1984..