I am not a big fan of throwing myself off of mountains. Ever. It's why skiing is just not my thing. I approached mountain biking with the same apprehension. When you sig up for your first experience at Steamboat Resort, you take a 3-hour lesson before even getting on the mountain. There are a lot of rules to this sport. How you stand, how you break, how you take a turn, etc. It was a bit overwhelming.
Then you take the gondola up 2,200 feet and you pick a trail (an easy one to begin with, of course) and off you go. Break too hard and you could fall off. Don't stand right, and you could fall off. Don't take the turn right and you could fall off. I mean, there are so many opportunities to fall off. None of them pretty.
So imagine the adrenaline rush as you speed down the mountain with this reality ever present in your mind. Imagine the excitement when you get to the bottom not having fallen off once. That's the part where you get addicted and find yourself doing it over and over again, because by then it's just a lot of fun.