Might have saved someone's life, or at least from a maiming. I was waiting in the ASL feeder lane, alongside pavement-edge scaffolding with a waist-high concrete base, behind a lorry turning left. The lights had turned green, the lorry was moving, and a plonker squeezed between me and a taxi, and started riding into the lorry-scaffolding gap. So I shouted (screamed, even) STOP, and told him that's where cyclists go to die you plonker. He did stop, so didn't ride into the gap, which had narrowed to nothing as you'd expect. He otherwise didn't acknowledge me.
While I was gathering my composure, the cyclist behind me barked "Green. Go!" as if my consideration for someone else's safety was of less worth than 2 seconds out of his commute.
