>I grew up on a ranch so a helmet while riding a bike is a rather silly notion considering I'd been on horses before I could walk and working around heavy machinery since I can remember.

That's funny you mention working on a ranch. When I was typing the earlier message I was remembering being kicked off a horse when I was 14 and just missing a huge boulder and rolling down a mountainside in Colorado... :o) I wouldn't have dreamed of wearing a helmet. Damage from a fall was just par for the course... Then thinking of all the four-wheelin I did back then and the number of times I almost didn't survive, yikes! What was I thinking? I guess I was enjoying life rather than worrying about losing it...