Me too. I went to a press gig at the Bell plant in SoCal in the 1980s. While there I was talking to a helmet engineer who mentioned that Bell had experimented with an open-face helmet covered with black leather to match motorcycle jackets. In the end, they scrapped it, because when the helmet hit the ground at speed the leather's friction against the pavement caused severe head rotation. Fiberglass, he said, was more prone to slide, and therefore a better choice.