You can hit your head on the ground dummy. Why would you even ask this? If you were smart enough, you would of known that you can accidentally fall and crack your head open. If you cared about your brains from any further brain damage, then I would suggest you use a helmet.
I thought i wouldn't need a helmet when i first started skating. I had fallen maybe a week or so after getting one and had a minor concussion. It doesn't hurt to have one.
Until you feel really confident in your skateboarding defiantly wear a helmet.
Well, If you are a starter I would say yes but as you get better and better you may not need it .. just be careful ,, i fell off a scateboard and banged my head to a wall .. so just be careful!