Wear a helmet.
I should and I sometimes do. I need to make it a priority.
A lady told me of a story when I was riding my horse at the arena.She said she was riding her horse on a trail along with her friends and she fell of and hit her head(she had a helmet on) and she got a concussion from it and she also broke her helmet from the fall.
People fall off all the time and should wear them for safety. Some people think they are "lame" but in the end you want to save your head and possibly your life! Don't worry what people think.