Can I hijack this thread? How about helmet mirrors? I mostly ride on roads and frequently in groups, so I greatly appreciate mine and I consider it to be in part a safety feature. But the other day a friend looked at my helmet/mirror setup and said, "But what if you fall? Won't the mirror go smashing into your face or eye?" And I thought, "oh" She could be right. The mirror is, of course, plastic, not glass, but in the wrong circumstances, it could make an unfortunate incident considerably worse....