Thanks, ladies. I'll use both of these stories next time I need to convince someone of the importance of helmets.

As an aside, I had a co-worker who used to ride into work without a helmet. I'd get after him with stories like this - followed by a (sort of ) gentle thwack upside the head.

He's finally wearing a helmet. I'm not sure if my haranging got thru to him or if he simply didn't want to get thwacked any more, but it matters not.