The ones that stick out most in my mind was when I was younger.
1. I was riding a bike in front of my house and teasing my neighbor. I was riding in circles and just poking fun. I guess when he had enough, he waited for me to come across and go to the sidewalk. That was when he pushed a skateboard and it caught my rear tire. It stopped the bike and I flew over the handlebars.
2. A giant tree was just cut down by the county and left a pile of wood chips on the street right in front of my house. I decided to have a contest to see who could have the biggest air coming off of that ramp. Not to be beat, I decided to off quickly. All I remember is the second I hit the ramp and falling. I don't remember the air time at all. It wasn't serious, just too fast. My front time just have tilted to the left and I didn't realize it when i came down. The bike stopped and i flipped over it.
3. not serious, but I was on my dad's road bike and decided to practice endos. I picked up some speed and slammed on the front brakes and lifted by bottom. It must have been the right speed because I was on my two wheels for a good 5 seconds. I was not trying to balance, I was just frozen looking at the road hoping not to flip over. Fortunately, I felt the back tire goign back down (maybe the wind or something) and pushed my back.