I've already fallen off my bike and I've only been bike training for one week (2 rides!). Yesterday morning we had a beautiful ride down Lake Washington Blvd, with a delicious brunch afterwards at Cafe Flora, and then in the last 0.2 miles from home I went flying over a buckle in the sidewalk, my bike bottomed out, and I tipped over. Let's note that my Studly Hubby, who was right in front of me, flew over the same sidewalk buckle and made it without incident so it's not my fault that I fell. It's my bike's fault.
Well I learned once again that the sidewalk hurts when you land on it.