We know it's dangerous, but it always looks like fun when it snows and you see people being dragged along behind a car on their sledge.
And it appears members of the Swedish airforce agree, because here's a video of them doing it… being towed by a fighter jet.
In the clip three nutty Swedes are pulled along by ropes as the jet weaves around the airfield. At least they have helmets on.
We just wish the video had ended with the fighter jet taking off and the airforce guys clinging on for dear life.
It goes without saying that you should not try this at home… unless you have your own airfield and fighter jet.