I went skydiving once. I'm not really an adrenaline junkie, I didn't do it expecting a rush or thrill. What I liked about it is that it feels like nothing else, except maybe zero gravity. In freefall, you have total freedom of motion. There's nothing to push off of...it's just a very bizarre sensation when you aren't connected to the ground. Also, in every direction you look, there's nothing nearby. In your immediate vicinity, there's just...nothing. It's really hard to compare to anything else, I was somewhat dazed for an hour afterwards.

I've gone 50+ mph downhill before, but it's totally different. You are very connected to the ground and can feel the road. You can tell how fast you're going by the landmarks around you.