A helmet could possibly prevent you from some amount of head injury in a collision. Not being involved in the collision in the first place will go a lot further in protecting your head though. I don't want to start the usual A&S argument but... Klink, if you wanted to post a few details about how your collision happened, maybe we could give some advice as to how to avoid it happening again. The good news is that you sound like you know how to take a fall at least.