It seems impossible to have a conversation about helmets and cycling without someone quoting scientific data showing they are not effective. Either that or someone will say their style or ride would not benefit from wearing a helmet. My theory has always been that you might be the most in control cyclist in the universe, but that does not mean you can control other people, or animals.
This is some crazy footage of man vs. beast. Every once in a while I hear stories about collisions with animals but I have never seen one on video. For those of you that will comment saying this is not a justification for wearing helmets, I am not saying I think wearing a helmet should be the law. I am saying I choose to wear a helmet 100% of the time when I ride because a friend of mine was spared his life while wearing one and that is enough science for me. The helmet carnage is at the 1:07 mark.