At 10 years old I learned not to use the front brake hard on dirt. I had an older cousin with a 64 Honda Trail 90. Did a little race thing in the farm yard against the clock. After the starting straight away I realized as was approaching the grainery barn a bit quick and didn't really know anything about braking. Washed out the front end , went down and was pinned under the bike. Wasn't hurt thanks to the muffler shield. I currently have possession of the same bike and if you look closely you can see the damage I caused on the headlight housing, brake lever and the muffler shield. Not hurt, so a cheap lesson that I never forgot.
GliderJohn