Not wearing a helmet.

I'm chiefly a mountain biker, but I spend a good deal of time on rail trails (very seldom on roads) to help build the legs.

It amazes me how many young mtbrs I see without helmets. Lots of mountain bikers - maybe they're new and don't know any better. But I also see dirt jumpers and BMX riders that seem to never wear them.

As a head injury survivor it gives me the chills. Accidents don't have schedules or ask for permission. Wear a helmet.

Steve Z