K and I took up mountain biking in July. It is the most fun thing that humans can do. I'm particularly fond of biking down steep, bumpy, tree-rooted downhills. I think I'm now addicted to the adrenaline rush from the danger. This has been an awakening for me; before July, I was afraid to ride my bike off a curb.
One of the "features" in my favorite trail is a curved, concrete staircase, with a steep drop off on the outside of the curve. The first couple times we rode this trail, I was too scared to bike down it.
Here's K trying to bike down these stairs for the first time today:
I like the bike flying down the hill at about 00:48. He's afraid of heights, so he has avoided riding down these stairs for months.
This video shows my first ride down the stairs a couple months ago:
The whooping and hollering is embarrassing, but it was a personal victory. It's not technically difficult to bike down these stairs; you just have to conquer the fear.