I was riding with some friends one time in the desert on a challenging and beautiful path. At times the path narrowed into a tiny ridge that curved around the desert cliffs with about the width of my handlebars. Scary but also exhilarating. I am comfortable with that sort of riding. As long as the trail is uphill or flat, I can manage the terrain without worry.
Downhill technical riding is something else. This is when you ride down steep paths that were never really designed for bike riding. When I start down a tech section, I am usually freeking out and just hope I can get to the bottom in one piece. Every now and then you have a drop. A drop is a ledge that you ride off of and then both you and your bike fall to the ground. If you are lucky, you fall together and land together and continue riding as if that was all part of the plan.