I found some pictures of the trail I used to ride in San Diego:
The 3rd picture in, is the closest I've come to falling off a cliff. I tried to slow up on the wood, but my tires had mud on them, so they just slid. I could tell I was going too fast to make the turn given the amount of traction I had. So I let off the brakes, and steered off the ramp, smacking into the side of the landing. I threw my weight to the right to prevent and endo, and landed on the downward ramp.
Then I got off, brushed myself off, and took a picture of where my bike landed. Worst part was, my water tasted like dirt for the rest the day
If I remember, I'll snap some pics of the trail I ride in Omaha next time I go. It doesn't look nearly as impressive, but I like the trail better. The california trail was pretty steep going down in a few spots, and I didn't have the power to get back up, so I was walking my bike alot. I can ride the whole trail in Omaha.