I witnessed ( yet another ) incident involving a cyclist wearing a lid, which looked to be a very good idea, on my 110 mile road ride yesterday. The guy on a bike just in front of me did a quick shoulder check before a move to his left, to take a left hand turn. The van which had just passed me, misjudged the guys speed, and clipped his ( turned ) head, with his mirror. It brought the cyclist down, who's head was the first thing to contact the ground. Everybody stopped, and the cyclist got straight up, and started giving the van driver a 'talking to'. I have absolutely no doubt that either bit of the incident would have had a very different outcome, had the rider been lidless. I thought of all the helmet refuseniks when I saw the van clip the guys head, and thought, that's another situation these people would never have thought of, when it comes to the obvious benefits of lid wearing. Sequential incidents, both having a ( relatively ) favourable outcome, just because the guy ( sensibly ) chose to wear a lid.