When I was a kid, we played a game where we would see who could go farthest in the swimming pool without coming up or taking a breath. If you’ve ever done it, you know that after you’ve let all of your air out but still want to go a few feet further, your lungs start burning, and your entire body is screaming at you. You frantically start thrashing in the water until you finally pull your head out of the water and take in a long, deep, wonderful breath of air.

Now: imagine that when you’re out of air, you calmly keep doing the breaststroke for 250 feet.

In frigid, ice-covered water.

In a Speedo.

Stig Severinsen is a Danish free-diver — one who dives without a scuba tank — and is a legitimate badass. The feat shown in this video is a World Record, and it’s one of several that he holds, including the Guinness World Record for holding your breath, which he did for 22 minutes. Some might say, “Why would you want to do that?” but Stig would probably be too busy holding his breath for 20 minutes and ten seconds in a goddamn shark tank to answer.