Sledding Day --> Out-of-it People

I'm having a friend of mine over tonight, so she came over around two and we went to the local sledding hill with one of my brothers. After a while my brother had to leave to get ready for a tournament. My friend and I had had some major wipeouts, and the snow was tightly packed.
After my brother left, we got on a sled together and set off down the hill. I'm not entirely sure what happened, but both of us were thrown from the sled - again. We hit pretty hard and as there was no one else at the hill, neither of us was motivated to get up for a good few minutes. We have no idea why, but there is something insanely comfortable about lying on hard-packed snow. We just lay there and stared at the sky or had our eyes closed, and we talked.
After a while, it occurred to one of us that maybe maybe we should get up. When I stood up, it felt so weird, and I wondered how long I had been lying on the ground. It hadn't been more than a few minutes, of course, but it felt like so much more.
When we got back, I was so out-of-it and sleepish that I was running on autopilot for a little while. It was fun...but it makes me wonder why people love to do things like roller coasters and sledding and skiing and snowboarding and white water rafting and such, things that give us about three minutes of believing in our guts that we are about to die... It is really fun though!